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Product information "Lenz Heat Sock 5.1 Toe Cap Set + Battery Packs rcB 1400"

The Lenz Sock 5.1 Toe Cap Set with rcB 1400 battery packs combines the proven comfort of the Heat Sock 5.1 with the powerful heating duration of the rcB 1400 Lithium Packs. The Toe Cap® heating elements warm the toes from above and below - sewn in flat and barely noticeable. Thanks to improved elasticity in the calf area, integrated shin protector and ring bandage, the socks fit perfectly, even on strong calves.

Advantages of the set

  • Toe Cap® technology - Even warmth in the toe area
  • Increased elasticity - Also ideal for strong calves
  • shin, toe and heel protectors for comfort & protection
  • Merino SOFTTEC® material mix with silk - breathable, soft & quick-drying
  • rcB 1400 batteries - up to 20h heating time, 3 levels or infinitely variable via app
  • USB-C charging cradle - with quick charge function & storage mode
  • Machine washable up to 30°C (remove batteries beforehand)

Technical specifications

Material socks30 % polyester | 25 % merino wool | 20 % polyamide | 15 % polyacrylic | 5 % silk | 5 % elastane
Accu size8.5 × 5.5 × 1.5 cm
Battery weightapprox. 95 g per piece
Heating timeup to 20 h (depending on heating level & conditions)
Control3 levels directly on the battery or infinitely variable via the Lenz Heat app

Package contents

  • 1 pair of Lenz Heat Sock 5.1 Toe Cap®
  • 1 pair of rcB 1400 lithium packs
  • 1 USB-C charging cradle for 2 batteries
  • 1 USB-C to USB-A charging cable
  • 2 contact protectors
  • 3 pairs of colored rubber bands
  • 1 wash bag with zipper
  • Free Heat app (Apple & Android)

We recommend the Hey Sport Microwash to extend the life of your heated socks.

FAQ about the rcB 1400 set

How long do the socks give off heat?
With the rcB 1400 batteries, the Heat Sock 5.1 provides heat for up to 20 hours.
Are the socks washable?
Yes, at 30°C in the washing machine. Please remove the batteries beforehand.
Which shoes are the 5.1 suitable for?
The knee-high socks are ideal for ski and snowboard boots, but also offer comfort in winter and work shoes.
Can I also use the batteries for other products?
Yes, the rcB 1400 packs are compatible with all Lenz Body Heat System products.
Properties "Lenz Heat Sock 5.1 Toe Cap Set + Battery Packs rcB 1400"
Area of application: Alpine skiing, Ski Nordic, Snowboard
Battery capacity: 1400mAh
Charging technology: USB
Color: Black, Red
Exact color name: Grey
Manufacturer: Lenz
Material: 30 % polyester | 25 % wool | 20 % polyamide | 15 % polyacrylic | 5 % silk | 5 % elastane
Product type: sports socks
Size: 35-38
Slat width: Normal
Sock length: High
Socks properties: Warming
Sports sock type: Heated socks
Target group: Gentlemen, Ladies

5 of 5 reviews

Average rating of 4.6 out of 5 stars


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5 reviews

November 25, 2025 10:38 PM

Review with rating of 4 out of 5 stars

Fast delivery top service

Fast delivery top service

October 28, 2025 8:25 AM

Review with rating of 4 out of 5 stars

Very good, my feet are now really nice and warm, the price is

Very good, I now have really nice warm feet, but the price is quite considerable, otherwise great

March 9, 2025 7:01 AM

Review with rating of 5 out of 5 stars

Top product

Simple and good operation and above all warm feet!

October 23, 2023 1:02 PM

Review with rating of 5 out of 5 stars

Super Qualität?

Super Qualität?

April 5, 2023 1:12 PM

Review with rating of 5 out of 5 stars

Très bon produit, livraison et service partfait

Très bon produit, livraison et service partfait de la part de Ski-Shop Ramser, Merci

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