85% matchBlack Diamond
Also pairs climbing hardware with technical apparel
What changes: Hardware-led with less apparel depth and no avalanche transceiver rivalry until recently
Brand profile
Mammut
Swiss alpine outfitter founded in 1862 as a ropemaker, making climbing hardware, Barryvox avalanche transceivers and technical mountain apparel.
DintikonOrigin
UnisexFocus
Gorpcore / OutdoorStyle
$$$$Price
What to know about Mammut
Mammut is a Swiss alpine sports company founded in 1862 as Kaspar Tanner's ropemaking workshop in Dintikon and now headquartered in Seon, Aargau. It builds climbing ropes and harnesses, Barryvox avalanche transceivers, packs, sleeping bags and technical apparel, with the Eiger Extreme line serving its most demanding alpine use. The group also owns Raichle boots, Ajungilak sleeping bags and Toko ski wax, and employs roughly 800 people. Private equity firm Telemos Capital has owned it since 2021, after Conzzeta. Design stays utilitarian: mountaineering cuts, hardshells, bold colour blocking.
How Mammut fits
Overall fit
slightly small
Mammut generally follows a slim Swiss/European athletic cut, so many shoppers — particularly North Americans — find pieces run about half to a full size small, while sleeve and body length tend to be generous.
Tip: Most non-slim builds are safest going one size up, especially in insulated or layering pieces.
Medium confidence · based on 14 sources
By category
| Category | Runs | Shape | Size advice |
|---|---|---|---|
| Hoodies & sweatshirts | slightly small | slim, close-fitting technical midlayer shape | Go up a size if you want a relaxed feel rather than a next-to-body midlayer. |
| Jackets | slightly small | trim, articulated alpine fit; hardshells cut close over a midlayer only | Size up if you plan to layer a thick insulator or have a broader chest; Eiger Extreme pieces run the slimmest. |
| Shirts & overshirts | slightly small | trim trekking-shirt cut, close through the torso | Consider sizing up if you have a broader chest or want room over a baselayer. |
| T-shirts & graphic tees | slightly small | slim athletic, narrow through the chest and sleeve | Size up one if you prefer a normal casual tee rather than a performance-fit shirt. |
| Trousers & pants | true to size | slim to regular with articulated knees and a gusseted crotch | Take your usual waist but check inseam options, as legs often need hemming. |
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
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Mammut fit questions
Does Mammut run big or small?
Mammut fits slightly small. Most non-slim builds are safest going one size up, especially in insulated or layering pieces. Mammut generally follows a slim Swiss/European athletic cut, so many shoppers — particularly North Americans — find pieces run about half to a full size small, while sleeve and body length tend to be generous.
How does Mammut fit?
Mammut generally follows a slim Swiss/European athletic cut, so many shoppers — particularly North Americans — find pieces run about half to a full size small, while sleeve and body length tend to be generous. Overall shape: athletic, trim European alpine cut through chest and waist.
How do Mammut hoodies & sweatshirts fit?
Mammut hoodies & sweatshirts fits slightly small. Go up a size if you want a relaxed feel rather than a next-to-body midlayer. Shape: slim, close-fitting technical midlayer shape.
How do Mammut jackets fit?
Mammut jackets fits slightly small. Size up if you plan to layer a thick insulator or have a broader chest; Eiger Extreme pieces run the slimmest. Shape: trim, articulated alpine fit; hardshells cut close over a midlayer only.
How do Mammut shirts & overshirts fit?
Mammut shirts & overshirts fits slightly small. Consider sizing up if you have a broader chest or want room over a baselayer. Shape: trim trekking-shirt cut, close through the torso.
Brand facts
- Founded
- 1862
- Origin
- Dintikon, Switzerland
- Made in
- Vietnam
- Price
- $$$$
- Focus
- Unisex
- Styles
- Gorpcore / Outdoor, Techwear, Athleisure / Sportswear