Redesigned from the inside out, the latest Stoney HS Thermo takes Mammut’s best-selling all-mountain insulated ski jacket and builds it into a more responsible, more durable, and more dialed-in winter workhorse. Using an optimized pattern to reduce fabric waste and a fully recycled single-material shell for easier end-of-life recycling, this iteration stays true to the Stoney legacy while drastically lowering its environmental footprint.

Driven by the Mammut DRY Tour 2-Layer waterproof laminate, targeted Ajungilak® synthetic insulation, and a full suite of mountain-ready features, this jacket is built for everything from storm laps to bluebird missions. X-vent pit zips regulate heat on long bootpacks, while a removable snow skirt, helmet-compatible hood, and glove-friendly pocketing keep you moving from first chair to last light.

Performance Technologies

Mammut DRY Tour 2-Layer

A dependable waterproof/breathable laminate engineered for cold-weather endurance. Keeps out heavy precipitation while maintaining moisture transport during high-output skiing.

Ajungilak® OTI™ Element Insulation

Recycled synthetic insulation placed strategically for warmth retention even in damp conditions—reliable, lightweight, and hard-wearing.

bluesign® Product

Meets the highest standard for responsible, resource-efficient textile production with minimized environmental impact.

PFC-Free DWR

A durable water-repellent finish designed without persistent chemicals, reducing ecological harm while maintaining effective wet-weather performance.

Features

• 80 g/m² recycled Ajungilak® OTI™ Element synthetic insulation

• Helmet-compatible hood with 1-point adjustment

• Water-repellent VISLON® AquaGuard® 2-way front zipper

• X-vent underarm ventilation for rapid heat release

• Two chest pockets with water-repellent zippers

• Internal mesh pocket + zippered inner pocket

• Zippered sleeve pocket for pass or essentials

• Wrist gaiters + adjustable Velcro cuffs

• Detachable elastic snow skirt

• Adjustable hem for personalized fit

Specifications

• Suitable For: Freeriding, skiing

• Fit: Snow Sports Regular

• Water Column: 15,000 mm

• Breathability: 20,000 g/m²/24h

• Denier: 75D x 75D

• Weight: 1049 g

Materials

• Main Material: 100% Recycled Polyester

• Membrane: Polyester-based

• Insulation:

  • 85% Recycled Polyester / 15% Polyester (primary + secondary fill)

• Inserts & Lining: Recycled polyester, polyamide, econyl-regenerated nylon