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Mammut
Alto Guide HS Hooded Jacket - Men's

4.777777777777778 out of 5 stars
18 Review

Out of Stock

Don't worry though, we have a lot more Men's Technical Shell Jackets in stock than that.

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Why We Like The Mammut Alto Guide HS Hooded Jacket

From snagging summits to hunting powder, Mammut's Alto Guide HS Hooded Jacket is built for the pursuit. The DRYtechnology Pro membrane shields us from slicing winds and driving snow, while the hood and hem cinch tight to stop the elements from blowing inside. As we climb, the articulated sleeves let us move freely and the underarm zips dump excess heat.


Details

  • Versatile technical hardshell jacket for wintry summits
  • 3-layer construction provides weatherproof protection
  • Underarm zippers offer extra airflow when needed
  • Two-way zipper for easy access to harness tie-in points
  • Helmet-compatible hood with reinforced peak for added coverage
  • Adjustable cuffs and cinchable hem help seal out the elements
  • Three zippered pockets remain accessible with a pack/harness on
  • Item #MAMU5GP
Material
[membrane/laminate] DRYtechnology Pro (3-layer), [face fabric] 40D x 40D 100% nylon
Insulation
none
Waterproof Rating
20,000mm
Breathability Rating
20,000g/m²
Seams
fully sealed
Fit
regular
Length
hip, cinchable hem
Center Back Length
[medium] 30in
Hood
fixed, helmet-compatible, adjustable, reinforced peak
Pockets
1 zippered chest, 2 harness-compatible zippered hand
Venting
underarm zippers
Thumbholes
none
Claimed Weight
1lb 0.65oz
Activity
backcountry skiing, backcountry snowboarding, hiking, mountaineering, ski mountaineering
Manufacturer Warranty
limited 2 year

Overall Rating

5 based on 18 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 4 reviews
5 Stars - 14 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?

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5 out of 5 stars

October 28, 2024

The jacket is very durable, lightweight and comfy. Good for breezy and rainy days. The jacket is best when you wear layers under it. The pit zips are great when you still have to wear the jacket but cool down after a hike. I wish I got a size smaller. I got a M (I’m 5’7) the jacket covers everything, just wished it would be a bit tighter and more over my hips instead of covering it. It restricts my movement when I would do a high knee movement.

Santiago G
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

March 5, 2024

Awesome hard shell, great value

Familiarity:
I've used it several times
Size Bought:
XL
Weight:
235

I absolutely love Mammut products, but have never had one of their shells because most of them don’t use Gore Tex. However I feel the Mammut dry tech is equivalent to regular Gore Tex, and at a lower price point. The fit is great as always with Mammut, true to size for athletic build. Big arms, shoulders, chest, a long torso and 36in waist. My 700 fill belay parka was really snug, but does fit, anything less bulky is great. Bungies in all the right places. People complain about the tight neck, but I love it because I hate cold air going down the front of my shell. I’m actually returning my Arc’teryx Beta LT in favor of this, the Beta LT is really nice, but not $200 nicer than this shell.

Evan B
5 out of 5 stars

January 27, 2024

Incredible!!!

This shell is amazing! It's become my everyday-shell due to its light weight and effectiveness at keeping wetness out. Rain or snow, this jacket has performed above expectations. It has all the features that I was looking for- pit zips to stay cool, lightweight, breathable, adjustable hood, and a two-way zipper. I wore this over an Amazon basics insulated puffy on a 16 mile winter hike up Mt.Marcy and never worried as the snow fell whether I'd end up wet or damp. Highly recommend!!!!

Ryan P
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

November 26, 2023

Great shell for snowboarding and snowmobiling. Flexible and durable.

William J
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

November 9, 2023

Outer layer life saver

In the most intense conditions, this produce stood up to the test. Beats rain and wind!

Hayden S
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

August 26, 2023

Absolute lovely material that does its job. I originally bought it for rock climbing adventures, but it's great for casual and city wear. I live in London so this is perfect for the unforcastable rain. Packs light in any pack that I have. Recommend for both the expert and beginner. Note there is nothing terribly warm about it. So you'll need layers under if the temps drop. Nicely there are zippers under the armpits to let airflow when you don't have the time to take it off.

Charlton L
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

August 23, 2023

Bomb Proof Shell

I got this shell to use for technical mountaineering and skiing and so far it has worked exactly as intended. This jacket fits well with a harness and is incredibly wind resistant. I used it in around 35 degrees with strong winds on Rainier and was more than warm enough with a thin puffy underneath. It's hood fits well with a climbing helmet and pockets are in a good place to facilitate storage with a backpack/harness on. Overall I am very happy and excited to see how it continues to preform.

ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

August 19, 2023

Great shell jacket

This jacket does exactly what it sets out to do- keep the weather- wind & water- out. I used this jacket for summer glacier objectives- Mt Rainier & Mt Baker- and it did a great job managing weather. It didn't trap too much moisture inside, so the "breathability" was good. This is a great final layer for winter sports like skiing or if you need to block out the elements. The medium was a bit big for me (5'8"), but I wanted it a bit larger since it was going over other layers

ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

July 16, 2023

Great all around jacket

I use this jacket mostly for mountaineering or wet hikes and it holds up great. It's a warm, but not too warm, outer layer that holds up great against wind and moisture. Then pockets are well placed and the quality of the fabric is great. It does seem a little big for a medium, but when layered, it fits great.

Ashley B
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

July 3, 2023

The seems and zippers are well made, kept us dry during our hikes and fishing adventures

Alice H
ExpertVoice.com

Originally reviewed on ExpertVoice.com