Founded in Switzerland in 1862 as a rope maker, Mammut has built more than 160 years of history. The brand continues to create innovative outdoor apparel and gear.
Under the brand slogan "Rise with the Mountain," Mammut supports people who grow through challenges by offering high-performance products and proposing new concepts.
This season, the Dry Down Collection features 25 styles, including new models. The lineup is divided into two categories: "Performance," built for harsh mountain environments, and "Urban," suited to everyday use. The collection is sold at Mammut stores nationwide and on the official online store.
The 2026 fall/winter Dry Down Collection ranges from high-end models for alpine activities such as high-altitude and winter mountaineering to lifestyle models for city life. It brings Mammut's insulation technology and comfort to a wider range of situations.
The collection will also be on special display at "Mammut Innovation 2026," a large-scale exhibition event held at Mammut Shinjuku for four days, from October 1 (Thursday) to October 4 (Sunday), 2026. Visitors are invited to stop by and get to know the collection better.
Many Dry Down Collection items are also carried by Mammut's major retail partners. For details on which items are available, please contact each retailer directly.
What Is Mammut's Dry Down?
Mammut defines Dry Down as down that meets both of the following conditions.
- It uses 100% high-quality pure goose or duck down with a fill power of 750 or higher. No synthetic fibers are mixed into the down itself.
- The down is given a special water-repellent treatment, or the outer fabric is waterproofed and reinforced with seam tape, so that moisture does not reduce the down's performance.
With these two approaches, the jackets keep their warmth even in snow and rain, while their light weight and freedom of movement let wearers stay agile even on winter mountains.
These features and benefits are also offered in lifestyle models for city life. The Urban products deliver the warmth, lightness, and ease of movement that city life calls for at a high level, and keep delivering them over the long term. The benefits of technology born on winter mountains can be enjoyed in everyday life.
Some models in Mammut's down category are not classified under the Dry Down Collection, depending on their intended use. However, all of them use 100% pure down with no synthetic fibers mixed in.
The collection offers a chance to try Mammut's Dry Down for this fall and winter and experience its warmth, light weight, and ease of movement.
Recommended Product 1: Eiger Nordwand Light Down IN Hooded Jacket AF
A lightweight insulation jacket from the Eiger Nordwand collection. It combines 900cuin fill power DRY DOWN with G-LOFT® ECO EVOX for high warmth. It packs down compactly for easy carrying and stays comfortable in damp conditions, making it a useful layering piece in many situations. G-LOFT® ECO EVOX synthetic insulation is placed in areas that tend to get wet to trap warmth. The outer fabric, recycled 20D Pertex® Quantum down-proof material, improves thermal performance, while DWR (durable water repellent) finish and Diamond Fus technology improve water resistance and durability. With a repairable design, it is a dependable all-rounder that can be worn for many seasons.
Recommended Product 2: Roseg 2.0 IN Hooded Jacket AF
A jacket that is handy outdoors and keeps wearers comfortable even on cold days. Highly insulating down made with recycled materials keeps the body warm, and the water-resistant fabric repels light rain. Convenient features include a removable hood and three pockets for essentials. With a button front, it suits an orthodox mountaineering style.
Recommended Product 3: Floeberg HS Thermo Hooded Coat AF Men
A two-layer hooded hardshell coat well suited to walking around town on cold days. The outer material is Pertex® Shield, which is waterproof and breathable, and the filling is highly insulating goose down. Four zippered outer pockets and one zippered inner pocket provide plenty of space and keep valuables secure. A drawcord at the hem and adjustable cuffs give a good fit, making it an easy-to-use everyday piece with excellent weather protection.
Recommended Product 4: Obelisk Gore-Tex HS Thermo Coat AF Men
A two-layer Gore-Tex® waterproof membrane and high-loft 750 fill power down insulation provide excellent warmth and protection in the cold season. In addition to five outer pockets, a hidden pocket under the storm flap offers plenty of storage. Adjustable cuffs and a zipper-expandable hem provide an optimal fit and ease of movement. It is a stylish item with a practical, urban design.
Recommended Product 5: Broad Peak Light IN Hooded Jacket AF
A lightweight, packable jacket that is handy for overnight hikes, ski touring, and alpine climbing. It belongs to the Broad Peak collection, which pursues light weight and functionality to the fullest, with compact packability and a streamlined micro-baffle construction. The jacket can be stowed in either of the zippered pockets on both sides, making it easy to carry. The 800cuin fill power DRY DOWN insulation keeps wearers warm even in rain and snow. It is a lightweight, compact, multi-purpose jacket to take on your next climb.
Special Page for the 2026 Fall/Winter Dry Down Collection
Mammut 2026 Fall/Winter Dry Down Collection special page
2026 Fall/Winter Dry Down Collection: 14 Urban Styles
Alps IN Hooded Jacket AF Men / ¥286,000
Alps IN Hooded Parka AF Women / ¥286,000
Alps HS Thermo Hooded Jacket AF Men / ¥253,000
Alps HS Thermo Hooded Parka AF Women / ¥253,000
Obelisk Gore-Tex HS Thermo Coat AF Men / ¥102,300
Floeberg HS Thermo Hooded Coat AF Men/Women / ¥85,800
Note: On special display at "Mammut Innovation 2026" (Mammut Shinjuku, October 1 (Thursday) to October 4 (Sunday), 2026) and available for advance sale in limited quantities. Sales in other regions of Japan begin on October 14 (Wednesday).
Floeberg HS Thermo Jacket AF / ¥81,400
Urban IN Overcoat AF / ¥77,000
Roseg 2.0 IN Hooded Jacket AF Men Classic / ¥64,900
Icyglow 2.0 IN Hooded Jacket AF Men / ¥63,800
Roseg 2.0 IN Hooded Jacket AF Men/Women / ¥62,700
Note: On special display at "Mammut Innovation 2026" (Mammut Shinjuku, October 1 (Thursday) to October 4 (Sunday), 2026) and available for advance sale in limited quantities. Sales in other regions of Japan begin on October 14 (Wednesday).
Seon IN Cardigan long AF Women / ¥52,800
Seon IN Quilting Jacket AF / ¥48,400
Roseg IN Vest AF / ¥44,000
2026 Fall/Winter Dry Down Collection: 11 Performance Styles
- Eiger Nordwand Pro Down IN Hooded Parka AF Men/Women / ¥220,000
- Eiger Nordwand Advanced Down IN Hooded Jacket AF Men / ¥154,000
- Eiger Nordwand Light Down IN Hooded Jacket AF Men/Women / ¥88,000
- Icefall SO Thermo Hooded Jacket AF Men / ¥82,500
- Treeline 3 in 1 HS Hooded Jacket AF Men / ¥82,500
- Treeline HS Thermo Hooded Jacket AF Men / ¥79,200
- Meron UL IN Jacket AF / ¥69,300
- Snowfield IN Hooded Jacket AF / ¥61,600
- Snowfield Zip-In Jacket AF / ¥55,000
- Glacier Light Zip-In Jacket AF / ¥52,800
- Broad Peak Light IN Hooded Jacket AF Men / ¥48,400
All prices include tax.
