Booster Strap – the power boost for your ski boot
One simple adjustment, a noticeable difference: The Booster Strap replaces the rigid Velcro closure on your ski boot with an elastic drawstring, ensuring direct power transfer, greater control, and less fatigue—from the first run to the last. After just the first turn, you’ll notice how much smoother and more responsive your boot feels. Whether you’re training for a race or cruising down the slopes for fun: The Booster Strap adapts to your skiing style and can be installed yourself in just a few minutes—no tools required.
Top Sellers
The Most Popular Booster Straps
From entry-level models to racing versions: These Booster Straps are the ones our customers buy most often—compatible with most popular ski boot Brands.
The Booster Strap consists of an elastic strap, high strength and a finely adjustable metal buckle. The Booster Strap connects the leg and the boot elastically and transfers the skier's movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes, the Booster World Cup is ideal for tall athletes and the Booster Soft for lighter smaller athletes. The fantastic Booster STRAP World Cup is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller.
In stock now, delivery time: 1-3 days
The Booster Strap Blue Medium consists of a high-strength elastic strap, high strength and a finely adjustable metal buckle. The Booster Strap elastically connects the leg and the boot and transmits the skier's movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. For medium-sized athletes, the Booster World Cup Medium is ideally suited. The fantastic BOOSTER STRAP Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installation Booster Strap Blue Medium: The BOOSTER STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic band is then stretched by a few cm. If you do not notice a dramatic difference in the response of the ski on your first turn, the BOOSTER STRAP is too loose or incorrectly installed. However, if after a few turns you feel that something is pushing you backward, the BOOSTER is too tight. Keep in mind that your skill improves with every experience, so your BOOSTER setting may vary over time. Adjust your skills. Note: On boots with a high shell at the front, the elastic part is located behind the shell at the front. It is recommended to remove the Velcro fastener, as this is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Medium consists of a high-strength elastic strap and a finely adjustable metal buckle. The Booster Strap elastically connects the leg to the boot and transfers the skier’s movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. The Booster Medium is ideal for athletes of medium height.The fantastic BOOSTER STRAP Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installation of the Booster Strap: The Booster STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic strap is then stretched by a few centimeters. If you don’t notice a dramatic difference in how the ski responds during your first turn, the Booster STRAP is too loose or installed incorrectly. However, if after a few turns you feel like something is pushing you backward, the Booster is too tight. Keep in mind that your skill improves with every experience, so your Booster setting may vary over time. Adjust it according to your skill level. Note: On boots with a high front shell, the elastic section is located behind the front shell. It is recommended that you remove the Velcro strap, as it is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Medium Pink consists of an elastic strap, high-strength construction, and a finely adjustable metal buckle. The Booster Strap elastically connects the leg to the boot and transfers the skier’s movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. The Booster Medium is ideal for athletes of medium height. The fantastic BOOSTER STRAP Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installation of the Boster Strap Pink: The Booster STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic strap is then stretched by a few centimeters. If you don’t notice a dramatic difference in how the ski responds during your first turn, the Booster STRAP is too loose or installed incorrectly. However, if after a few turns you feel like something is pushing you backward, the Booster is too tight. Keep in mind that your skill improves with every experience, so your Booster setting may vary over time. Adjust it according to your skill level. Note: On boots with a high front shell, the elastic section is located behind the front shell. It is recommended that you remove the Velcro strap, as it is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Green Medium consists of a high-strength elastic strap and a finely adjustable metal buckle. The Booster Strap elastically connects the leg to the boot and transfers the skier’s movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. The Booster World Cup Medium is ideal for athletes of medium height. The fantastic BOOSTER STRAP Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installation of the Booster Strap Green: The BOOSTER STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic strap is then stretched by a few cm. If you don’t notice a dramatic difference in how the ski responds during your first turn, the BOOSTER STRAP is too loose or installed incorrectly. However, if after a few turns you feel like something is pushing you backward, the BOOSTER is too tight. Keep in mind that your skill improves with every experience, so your BOOSTER setting may vary over time. Adjust according to your ability. Note: On boots with a high front shell, the elastic section is located behind the front shell. It is recommended to remove the Velcro strap, as it is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Medium consists of an elastic strap, high tensile strength, and a finely adjustable metal buckle. The Booster Strap elastically connects the leg to the boot and transfers the skier’s movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. The Booster World Cup Medium is ideal for athletes of medium height.The fantastic BOOSTER STRAP Worldcup Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installing the Booster Strap: The BOOSTER STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic strap is then stretched by a few centimeters. If you don’t notice a dramatic difference in how the ski responds during your first turn, the BOOSTER STRAP is too loose or installed incorrectly. However, if after a few turns you feel like something is pushing you backward, the BOOSTER is too tight. Keep in mind that your skill improves with every experience, so your BOOSTER setting may vary over time. Adjust according to your abilities. Note: On boots with a high front shell, the elastic section is located behind the front shell. It is recommended that you remove the Velcro strap, as it is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Kids is the elastic power strap for children’s ski boots: two short elastic straps connect the leg to the boot, allowing the boot to respond more directly and reducing the impact on the shin. For children up to about 52 kg, color: Black. Booster Kids Strap: More Feel for Young Skiers The original Powerstrap is a rigid strap, while the “ Booster ” Strap is elastic: It keeps the leg taut against the cuff, gives way during a fall, and snaps back into place. Children feel the ski sooner and ski more smoothly. The Kids model is shorter and softer than the adult models so that it works effectively even on small cuffs and with light weight. Includes a finely adjustable metal buckle, four screws, and washers. Features in Detail √ 2 short elastic straps, softly tuned √ For children up to about 52 kg √ Finely adjustable metal buckle √ Mounting with 4 screws and washers, included √ Color: Black, one size Intended Use Children’s ski boots for ski lessons, ski clubs, and for kids who already ski competitively. Assembly Unscrew the original Powerstrap, mount the Booster Strap using the included screws, and place the strap on the tongue of the inner boot. If desired, we can install it for you in our workshop. How do I install the Booster Strap? Unscrew the original Power Strap, attach the Booster Strap to the cuff using the four included screws and washers, and position the strap over the tongue of the liner. We’re happy to do this for you in the store. Does the strap fit any ski boot? Yes, on all alpine ski boots with Powerstrap screws. For boots without screws, an adapter is required. How tight should the strap be? Tight, but without pinching the leg. The elastic strap only works when it’s under tension. Which “ Booster ” strap do I need? Kids up to about 52 kg; Soft for good skiers and light racers; Medium Expert for very good skiers and racers; World Cup for skiers weighing 100 kg or more or for World Cup use. Can I tighten the strap with a buckle? Yes, the metal buckle is finely adjustable and can be operated while wearing gloves.
In stock now, delivery time: 1-3 days
The Booster Strap Soft is the elastic power strap for good skiers and lightweight racers: two semi-elastic straps hold the leg against the cuff but give enough so that the boot doesn’t feel stiffer than necessary. For boots up to flex 100, color: Black. Booster Soft Strap: the softer Booster for flex up to 100 The Booster Strap replaces the rigid Power Strap with an elastic strap that connects the leg and boot under tension. Movements are transmitted more directly to the ski, and impacts on the shin are cushioned. The Soft version with two straps is designed for skiers weighing up to about 82 kg or wearing boots with a flex rating below 100; the Medium version with three straps is for more athletic skiers. The metal buckle is finely adjustable, and screws are included. Features in Detail √ 2 semi-elastic straps, soft tuning √ For good skiers and lightweight racers, boots up to flex 100, up to about 82 kg √ Finely adjustable metal buckle √ Mounting with 4 screws and washers, included √ Color: Black, one size Intended Use Piste and Skiclub for good skiers and teens who have outgrown the Kids Strap. Assembly Unscrew the original Powerstrap, mount the Booster Strap using the included screws, and place the strap on the tongue of the inner boot. If desired, we can install it for you in our workshop. How do I install the Booster Strap? Unscrew the original Power Strap, attach the Booster Strap to the cuff using the four included screws and washers, and position the strap over the tongue of the liner. We’re happy to do this for you in the store. Does the strap fit any ski boot? Yes, on all alpine ski boots with Powerstrap screws. For boots without screws, an adapter is required. How tight should the strap be? Tight, but without pinching the leg. The elastic strap only works when it’s under tension. Which “ Booster ” strap do I need? Kids up to about 52 kg; Soft for good skiers and light racers; Medium Expert for very good skiers and racers; World Cup for skiers weighing 100 kg or more or for World Cup use. Can I tighten the strap with a buckle? Yes, the metal buckle is finely adjustable and can be operated while wearing gloves.
In stock now, delivery time: 1-3 days
The Booster Strap consists of an elastic strap, high strength and a finely adjustable metal buckle. The Booster Strap connects the leg and the boot elastically and transfers the skier's movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes, the Booster World Cup is ideal for tall athletes and the Booster Soft for lighter smaller athletes. The fantastic Booster STRAP World Cup is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller.
In stock now, delivery time: 1-3 days
The Booster Strap Blue Medium consists of a high-strength elastic strap, high strength and a finely adjustable metal buckle. The Booster Strap elastically connects the leg and the boot and transmits the skier's movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. For medium-sized athletes, the Booster World Cup Medium is ideally suited. The fantastic BOOSTER STRAP Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installation Booster Strap Blue Medium: The BOOSTER STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic band is then stretched by a few cm. If you do not notice a dramatic difference in the response of the ski on your first turn, the BOOSTER STRAP is too loose or incorrectly installed. However, if after a few turns you feel that something is pushing you backward, the BOOSTER is too tight. Keep in mind that your skill improves with every experience, so your BOOSTER setting may vary over time. Adjust your skills. Note: On boots with a high shell at the front, the elastic part is located behind the shell at the front. It is recommended to remove the Velcro fastener, as this is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Medium consists of a high-strength elastic strap and a finely adjustable metal buckle. The Booster Strap elastically connects the leg to the boot and transfers the skier’s movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. The Booster Medium is ideal for athletes of medium height.The fantastic BOOSTER STRAP Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installation of the Booster Strap: The Booster STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic strap is then stretched by a few centimeters. If you don’t notice a dramatic difference in how the ski responds during your first turn, the Booster STRAP is too loose or installed incorrectly. However, if after a few turns you feel like something is pushing you backward, the Booster is too tight. Keep in mind that your skill improves with every experience, so your Booster setting may vary over time. Adjust it according to your skill level. Note: On boots with a high front shell, the elastic section is located behind the front shell. It is recommended that you remove the Velcro strap, as it is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Medium Pink consists of an elastic strap, high-strength construction, and a finely adjustable metal buckle. The Booster Strap elastically connects the leg to the boot and transfers the skier’s movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. The Booster Medium is ideal for athletes of medium height. The fantastic BOOSTER STRAP Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installation of the Boster Strap Pink: The Booster STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic strap is then stretched by a few centimeters. If you don’t notice a dramatic difference in how the ski responds during your first turn, the Booster STRAP is too loose or installed incorrectly. However, if after a few turns you feel like something is pushing you backward, the Booster is too tight. Keep in mind that your skill improves with every experience, so your Booster setting may vary over time. Adjust it according to your skill level. Note: On boots with a high front shell, the elastic section is located behind the front shell. It is recommended that you remove the Velcro strap, as it is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Green Medium consists of a high-strength elastic strap and a finely adjustable metal buckle. The Booster Strap elastically connects the leg to the boot and transfers the skier’s movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. The Booster World Cup Medium is ideal for athletes of medium height. The fantastic BOOSTER STRAP Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installation of the Booster Strap Green: The BOOSTER STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic strap is then stretched by a few cm. If you don’t notice a dramatic difference in how the ski responds during your first turn, the BOOSTER STRAP is too loose or installed incorrectly. However, if after a few turns you feel like something is pushing you backward, the BOOSTER is too tight. Keep in mind that your skill improves with every experience, so your BOOSTER setting may vary over time. Adjust according to your ability. Note: On boots with a high front shell, the elastic section is located behind the front shell. It is recommended to remove the Velcro strap, as it is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Medium consists of an elastic strap, high tensile strength, and a finely adjustable metal buckle. The Booster Strap elastically connects the leg to the boot and transfers the skier’s movements directly to the ski. Designed and manufactured to meet the needs of World Cup athletes. The Booster World Cup Medium is ideal for athletes of medium height.The fantastic BOOSTER STRAP Worldcup Medium is worn by numerous superstars, including Olympic champions such as Ted Ligety and Bode Miller. Installing the Booster Strap: The BOOSTER STRAP should be routed outside the rear spoiler and inside the plastic shell against the front tongue. The elastic strap is then stretched by a few centimeters. If you don’t notice a dramatic difference in how the ski responds during your first turn, the BOOSTER STRAP is too loose or installed incorrectly. However, if after a few turns you feel like something is pushing you backward, the BOOSTER is too tight. Keep in mind that your skill improves with every experience, so your BOOSTER setting may vary over time. Adjust according to your abilities. Note: On boots with a high front shell, the elastic section is located behind the front shell. It is recommended that you remove the Velcro strap, as it is no longer necessary or desirable.
In stock now, delivery time: 1-3 days
The Booster Strap Kids is the elastic power strap for children’s ski boots: two short elastic straps connect the leg to the boot, allowing the boot to respond more directly and reducing the impact on the shin. For children up to about 52 kg, color: Black. Booster Kids Strap: More Feel for Young Skiers The original Powerstrap is a rigid strap, while the “ Booster ” Strap is elastic: It keeps the leg taut against the cuff, gives way during a fall, and snaps back into place. Children feel the ski sooner and ski more smoothly. The Kids model is shorter and softer than the adult models so that it works effectively even on small cuffs and with light weight. Includes a finely adjustable metal buckle, four screws, and washers. Features in Detail √ 2 short elastic straps, softly tuned √ For children up to about 52 kg √ Finely adjustable metal buckle √ Mounting with 4 screws and washers, included √ Color: Black, one size Intended Use Children’s ski boots for ski lessons, ski clubs, and for kids who already ski competitively. Assembly Unscrew the original Powerstrap, mount the Booster Strap using the included screws, and place the strap on the tongue of the inner boot. If desired, we can install it for you in our workshop. How do I install the Booster Strap? Unscrew the original Power Strap, attach the Booster Strap to the cuff using the four included screws and washers, and position the strap over the tongue of the liner. We’re happy to do this for you in the store. Does the strap fit any ski boot? Yes, on all alpine ski boots with Powerstrap screws. For boots without screws, an adapter is required. How tight should the strap be? Tight, but without pinching the leg. The elastic strap only works when it’s under tension. Which “ Booster ” strap do I need? Kids up to about 52 kg; Soft for good skiers and light racers; Medium Expert for very good skiers and racers; World Cup for skiers weighing 100 kg or more or for World Cup use. Can I tighten the strap with a buckle? Yes, the metal buckle is finely adjustable and can be operated while wearing gloves.
In stock now, delivery time: 1-3 days
The Booster Strap Soft is the elastic power strap for good skiers and lightweight racers: two semi-elastic straps hold the leg against the cuff but give enough so that the boot doesn’t feel stiffer than necessary. For boots up to flex 100, color: Black. Booster Soft Strap: the softer Booster for flex up to 100 The Booster Strap replaces the rigid Power Strap with an elastic strap that connects the leg and boot under tension. Movements are transmitted more directly to the ski, and impacts on the shin are cushioned. The Soft version with two straps is designed for skiers weighing up to about 82 kg or wearing boots with a flex rating below 100; the Medium version with three straps is for more athletic skiers. The metal buckle is finely adjustable, and screws are included. Features in Detail √ 2 semi-elastic straps, soft tuning √ For good skiers and lightweight racers, boots up to flex 100, up to about 82 kg √ Finely adjustable metal buckle √ Mounting with 4 screws and washers, included √ Color: Black, one size Intended Use Piste and Skiclub for good skiers and teens who have outgrown the Kids Strap. Assembly Unscrew the original Powerstrap, mount the Booster Strap using the included screws, and place the strap on the tongue of the inner boot. If desired, we can install it for you in our workshop. How do I install the Booster Strap? Unscrew the original Power Strap, attach the Booster Strap to the cuff using the four included screws and washers, and position the strap over the tongue of the liner. We’re happy to do this for you in the store. Does the strap fit any ski boot? Yes, on all alpine ski boots with Powerstrap screws. For boots without screws, an adapter is required. How tight should the strap be? Tight, but without pinching the leg. The elastic strap only works when it’s under tension. Which “ Booster ” strap do I need? Kids up to about 52 kg; Soft for good skiers and light racers; Medium Expert for very good skiers and racers; World Cup for skiers weighing 100 kg or more or for World Cup use. Can I tighten the strap with a buckle? Yes, the metal buckle is finely adjustable and can be operated while wearing gloves.
In stock now, delivery time: 1-3 days
Technology
How the Booster Strap Transfers Your Power to the Skis
Standard ski boot closures are rigid and give way under load—valuable energy is lost before it reaches the ski. The Booster Strap replaces this closure with a highly elastic Powerband that stretches as you lean forward and transfers the force to the tip of the ski without delay. The result: more precise edge grip, a more direct feel for the ski, and noticeably more energy reserves in your legs when it matters most—in the final meters of the run or during a race. This effect is particularly noticeable with ski boots featuring a high forward lean angle, where every millisecond of delay in force build-up determines a clean turn initiation. It is precisely this direct feedback that experienced skiers and snowboarders value so much about the Booster Strap, because it allows them to apply their power more precisely and without delay.
In detail, each strap contains a multi-layered elastomer fabric that is engineered to stretch evenly under tension rather than give way at a single point. It is precisely this uniform stretching that ensures the force from your push-off isn’t lost in the material but is continuously transferred to the shell. That’s why athletes in the World Cup rely on the Booster World Cup Strap, which was developed for maximum tensile strength and minimal stretch tolerance. But this precision pays off even outside of racing—for example, when you need to change edges in a flash on an icy slope and want to rely on your boot to respond instantly. Ultimately, it’s precisely this interplay of material tension and fit that makes the noticeable difference between an ordinary Velcro strap and a true Powerband.
Instructions
Installs in just a few minutes—no tools required
The Booster Strap is installed in place of the existing top buckle: on the outside around the spoiler, resting against the tongue of the boot on the inside, with the Velcro strap secured with light tension. No drilling, no tools, no cobbler needed—you can install it in about five minutes, even at your kitchen table or right on the slopes. Afterward, your ski boot will fit noticeably tighter on your leg without compromising your range of motion when bending. If you want to be absolutely sure, have our expert team in the shop show you the first few steps or watch a short video tutorial beforehand. Once you’ve got the hang of it, you’ll be able to install the strap yourself in just a few minutes—whether at home at the kitchen table or right at the base station.
Before installing, it’s worth taking a quick look at the circumference of your lower leg, as the Booster Strap is available in several lengths and will only fit perfectly with the right size. For most adults with an average calf circumference, for example, the Booster Strap Black Medium is suitable, and you can install it directly without any adjustments. During installation, first open the existing clasp completely, thread the new strap around the spoiler in the same direction, and only tighten it to the desired tension when closing it. Make sure the strap lies flat and doesn’t crease, otherwise it may pinch in certain spots. Once it’s fitted correctly, it stays in place all season long, and afterward you just need to open and close it as usual.
Fit
Anyone who wants more precision from their ski boot
The Booster Strap isn’t just for racing, even though it’s standard equipment in the World Cup. Ambitious on-piste skiers, freeriders, and anyone who frequently experiences cold feet or a wobbly feeling in their shins will benefit just as much: The snugger fit improves thermal insulation, reduces pressure points through more even distribution, and gives you the confidence with every turn that your boot will keep up when you open up the throttle. Even in youth and race training, more and more coaches are relying on the Booster Strap because it helps young skiers execute their technique more cleanly and reduces leg fatigue. Even if you’re only on the slopes occasionally, you’ll clearly feel the smoother boot shell during quick changes of direction and on uneven terrain. In short: As soon as your ski boot noticeably gives way under load, the Booster Strap is an obvious and simple solution.
Whether you hit the slopes three or thirty times a winter makes little difference to the benefits of the Booster Strap, because the principle of direct power transfer works for every skiing style. For recreational skiers, this means, above all, a more stable fit in the boot and less calf fatigue after a long day on the slopes. Ambitious skiers, on the other hand, will especially notice the more precise edge grip when every reaction counts on mogul runs or at high speeds. Even those who have previously struggled with cold toes or pressure points often report a noticeable improvement, as the more even fit restricts blood flow less. If you’re unsure which model suits your ski boot and riding style, you’ll find a comparison of all models on the Booster Strap overview page.
FAQ
Questions and Answers About Booster
Everything you need to know about Booster —answered concisely.
