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Product Information "The Mountain Studio M-9 Pertex Insulated Midlayer Men’s Fudge"

The Mountain Studio ’s M-9 is a lightweight, insulated midlayer that can be worn under a shell in winter and functions as a standalone jacket in spring or around town. The exterior is made of Pertex 20D Quantum Ripstop, the interior features 40 g of PrimaLoft Gold Eco, and the sides under the arms are lined with stretch grid fleece for mobility and breathability. Fudge is a dark chocolate brown.

The Mountain Studio M-9 Pertex Insulated Midlayer in Fudge

The tightly woven Pertex outer fabric, made of 100 percent nylon, blocks light wind and drizzle while remaining breathable; the 100 percent polyester insulation keeps you warm even when wet. Hood, chin guard, one chest pocket, and two hand pockets with YKK zippers. The grid fleece on the sides is made of 93 percent polyester and 7 percent spandex.

  • √ The Mountain Studio M-9, Men’s Insulated Midlayer, Color: Fudge
  • √ Pertex 20D Quantum Ripstop, 100% nylon
  • √ PrimaLoft Gold Eco insulation 40 g, 100% polyester
  • √ Stretch grid fleece under the arms, 93% polyester, 7% spandex
  • √ Hood, chin guard
  • √ 1 chest pocket, 2 hand pockets, YKK zippers
  • √ Can be worn as a midlayer under a shell or on its own
  • √ Sizes XS through XXL, 2026/27 collection

Who is the M-9 designed for?

For anyone who skis using the layering method: wear the Z-2 EPE or Y-1 EPE as a base layer, and as an outer jacket during ascents or in the spring. Also great for hiking, climbing, and everyday wear.

Care

Wash at 30 degrees on the gentle cycle, turned inside out with zippers closed. Use mild detergent; do not use fabric softener.

How does the sizing work?

Men’s sizes feature an ergonomic, athletic cut that leaves room for a midlayer. If you wear thick midlayers underneath or prefer a looser fit, choose one size larger.

Can I wear the M-9 on its own?

Yes. In mild weather, it can be worn as a standalone insulated jacket; in cold weather, as a midlayer under a shell.

How warm is the M-9?

40 g PrimaLoft Gold Eco—that’s lightweight insulation for active days. For the chairlift at minus 15 degrees, you’ll need a shell over it.

Is the jacket waterproof?

No, Pertex fabric is wind- and water-repellent, but it is not a membrane.

Who is behind The Mountain Studio?

The Mountain Studio was founded in Zermatt and develops technical ski apparel in Switzerland, featuring minimalist designs and a focus on durable materials.

Properties "The Mountain Studio M-9 Pertex Insulated Midlayer Men’s Fudge"
Clothing size: XL
Color: brown
Exact color name: Fudge
Manufacturer: The Mountain Studio
Product type: Casual jacket
Size: XL
Target group: Gentlemen
Year: 2027

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