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Stoney HS Pant - Men's

4.5 out of 5 stars
36 Reviews
Current price: $154.50 - $203.40 Original price: $339.00
Up to 50% off
Color:Blood Red


Size Chart


Why We Like The Stoney HS Pant

From scoping lines deep in the backcountry to searching for hidden gems at the resort, the Stoney gives us the freedom to find and shred the season's best turns. Mammut's DRYtech Pro material holds its own through rugged conditions and turns away icy gusts and deep powder, all while letting our skin breathe underneath to keep us comfortably dry.


  • Classic hardshell pant for back bowls and backcountry powder
  • 2-layer construction provides wind- and waterproof protection
  • Active stretch material follows your every move
  • Outer-thigh zippers allow you to dump excess heat
  • Hook-and-loop waist tabs provide a customized fit
  • Adjustable hem and elastic gaiter stop snow from packing in
  • Rugged kick patches provide increased durability
  • Back belt loop snaps connect to compatible jackets
  • Item #MAMU5D9
Responsible Collection
Bluesign Approved
[membrane/laminate] 2L DRYtechnology Pro (polyurethane), [face fabric] 40D 88% nylon, 12% spandex, [lining] 100% polyester, [insert] 83% nylon, 10% polyester, 7% spandex, [kick patch] Cordura
Waterproof Rating
fully sealed
[size 48] 32in
2 zippered hand, 1 zippered thigh
outer-thigh zippers
adjustable hook-and-loop tabs, belt loops
Cuff Closure
snap adjustment
Claimed Weight
1lb 7.3oz
Manufacturer Warranty
2 year
freeride skiing, backcountry skiing

Overall Rating

4.5 based on 36 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 2 reviews
3 Stars - 5 reviews
4 Stars - 2 reviews
5 Stars - 27 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


Selecting an option will reload the available reviews on the page
5 out of 5 stars

June 10, 2024

Great for resort skiing

I love these for resort skiing, the waterproofing is excellent. The vents work incredibly well. I am 5’10 170lbs and got the 32 waist and regular length pants and they fit snug around my hips but perfectly for me. If you wear regular pants in a size 32 but you want to be able to layer more and less body hugging I would go a size up. I just wear a thin thermal layer underneath and they’ve been warm enough for mid season skiing in Alaska.

Maxwell F

Originally reviewed on

5 out of 5 stars

April 4, 2024

Great slimmer fitting option

I've used it once or twice and have initial impressions
Size Bought:

They fit perfectly, slimmer than some other options. The only slightly strange thing about these is the pockets; they are not all that deep, but large enough for something like a wallet or a smaller phone. As someone else mentioned, there is some light insulation, but that is fine for resort skiing.

Ari A
3 out of 5 stars

March 30, 2024

MORE Than Just A Shell

I returned this product before using it
Size Bought:
5' 10"

These pants are smartly designed and constructed, high quality, and fit great. (I'm 5'10", 165 pounds, and the size 32s were tailored but comfortable.) Unfortunately, the description doesn't accurately represent them so I have to send them back. While ordering, I noted that despite the product description that says these are exclusively a shell, several customer reviews mentioned a built-in, insulating liner. I need these pants for skinning and backcountry, so I only need a shell—built-in insulation would be too much for high-output. As such, I contacted Backcountry Customer Service, and the representative assured me these were a shell only, no insulation. When I pressed to be sure, the agent said that the reviews were probably for a different pant and that the reviewers who said they had insulation were wrong. So I ordered them. On receipt, I'm disappointed to find that these pants do in fact have a light insulating interior layer. They would be great for resort skiing. But unless you are an extremely cold person or plan to ski with nothing under these pants, they are likely going to be too heavy for any aerobic use. Again, they are awesome looking pants. But don't be misled: they are NOT just a shell; they definitely have a light insulating layer inside.

Aaron G
5 out of 5 stars

March 24, 2024

great pants

I've used it several times
Size Bought:
Small / 30

These are great ski pants for cold, snowy or wet conditions. Their only shortcoming is that they are on the warm side for a shell pant, because the inside liner (they are 2 layer, not 3 layer) is quite warm. That said, they have excellent outside leg vents, and I run hot, so this will be a non-issue for most folks (and for me, except in the spring). I have worn these in cold and windy and warm and sunny conditions and they have performed admirably. They are very comfortable, fit really well (size S, I am 5’6” and 145lbs) and look great.

5 out of 5 stars

March 20, 2024

Warm, dry, durable/well constructed, great pockets/vents.

Michael M

Originally reviewed on

5 out of 5 stars

March 20, 2024

Super nice pant, definitely a "Euro" cut

Love the pants, super nice like all Mamut gear with thoughtful features and great materials. But, take heed yee of "athletic" proportions! I'm a thin, skinny-legged 6'2 with the 34 and if I had manly quads there is no way these would fit. Size up. As is, they are great for me but it's *close*.

Kevin W

Originally reviewed on

5 out of 5 stars

March 19, 2024

Very comfy and versatile

Pants fit true to size. I'm a 30 in regular pants and the stoney size 30 fits perfectly. They are a little warmer than other shell pants I have owned in the past. Overall, the most comfortable pants I have ever owned. I would recommend these for resort and bc use. Although, the pants do not come with a built in transceiver attachment. The vents are very useful on the ups, and the extra warmth helps on the downs.

Glen G

Originally reviewed on

5 out of 5 stars

February 28, 2024

Great Pants

I was able to get a size than fit me well. Many other pants are too long and baggy but the Short fitting is great for me (5'9"). The pants are warm, comfortable and stylish.

Fred R

Originally reviewed on

5 out of 5 stars

February 20, 2024

Flexible, beathable, and durable.

I have only used the pants for resort skiing so far, but I have taken them through all sorts of terrain in weather from -10 centigrade to 0 centigrade. Not only are they extremely comfortable, flexible and light, my temperature has been maintained perfectly. The pockets themselves on the front are small and cannot hold much, and I have opted instead to use my jacket pockets instead for comfort reasons. Overall, extremely satisfied and can't wait to try them touring.

Originally reviewed on

5 out of 5 stars

January 8, 2024

My first pair of Mammut bottoms and the one thing I wish I had done was read more reviews on the item's actual product page. I'm 6'2, 185 but athletically built. So while I'm not popping out like Arnold or CBum, the pants are snug around the hips. When I initially put them on, my immediate thought was that I'm jacked(not in the good way) coz they felt tight coming up, and this was with no base/mid layer underneath. I still had a butt-pad to fit in. The front of it was pushing down on my jewels already. A few weeks in, I have been riding in these with a butt pad on and there has honestly been 0 discomfort. They have some stretch to them which has certainly helped. I dont use the pockets at all. And so far, I haven't had to use a base layer. They have insulation which has served well. They've also held their own in a couple PNW downpours and he waterproofing is solid. My rating of 9/10 was only because of how slim they run. I picked a size 34 since I am a 32 and figured 36 might be too loose. Even with the 34, I use the waist adjustment all the way and have tonnes of room everywhere but the hips. All that said, if you are looking at these, pay a little extra attention to the measurements before you buy it, but buy it.

Originally reviewed on