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Alto Light HS Pant - Men's

4 out of 5 stars
2 Reviews
Current price: $94.50 Original price: $189.00
50% off


Size Chart


Why We Like The Mammut Alto Light HS Pant

The Mammut Alto Light HS Pant comes along in our pack for weeklong backpacking trips with rain in the forecast or day hikes in the mountains when conditions can quickly change. The easily packable pants are lightweight and stretchy, allowing us to move quickly along forested trails and windswept ridges. The DRYtechnology treatment blocks out wind and rain, so we can be prepared for any shifts in the weather. The elastic waistband stays comfortable as we scramble up boulder fields, and as the skies clear, we can quickly change into something less protective thanks to the full-length side zippers.


  • Hardshell pants for complete protection in any conditions
  • 2.5L DRYtechnology offers wind and waterproof protection
  • Stretch fabric allows for a full range of movement
  • Elastic waistband gives us a perfectly secure fit
  • Adjustable hem and leg help to reduce bulk on the move
  • Full-length side zippers allow us to quickly get them on and off
  • Packs into its own pocket to be brought along on any adventure
  • Regular fit is designed can be worn on its own or over light layers
  • Item #MAMU5MC
[membrane/laminate] 2.5L DRYtechnology, [face fabric] 100% polyester, PFC-free DWR treatment, [lining] 100% polyester
[regular] (30) 32.1in, (32) 32.3in, (34) 32.5in, (36) 32.7in, (38) 32.9in, (40) 33.1in, (42) 33.3in, [short] (30) 29.7in, (32) 30in, (34) 30.1in, (36) 30.3in, (38) 30.5in, (40) 30.7in
Leg Opening
hook-and-loop adjustment
1 zippered thigh (packable)
elastic, hook-and-loop adjustment
Side Zips
Claimed Weight
Manufacturer Warranty
limited 2 year

Overall Rating

4 based on 2 ratings

Review Summary

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

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4 out of 5 stars

February 16, 2024

Slim, ultralight stretch. Could be more adjustable.

The material is very light, both in weight and durability. Within one day of climbing in the high alpine, I put a small tear in the rear end scootching over rock. Based on that experience, these come with me as a backup layer: they live in the bottom of my pack on ski tours and winter climbs to zip over my softshell pants in case conditions get properly wet/cold. They seem well-made given the light material. The zippers haven't let water in and the ankle velcro makes me confident the ankle won't tear open. That said, I wish there was more adjustability in the waist and ankles, via either more elastic range or cinches. My sides are pretty straight and I can't fit too much underneath these, but the waist is just barely tight enough. The ankle Velcro won't snug down to my leg, although it does tighten enough to lock over ski boots or large mountaineering boots.

Carter M

Originally reviewed on

4 out of 5 stars

July 11, 2023

Love the length, not so much the material

The length, fit, and features (button-up, elastic waistband, water resistant pocket) are all wonderful. They are also super lightweight and pack very small. The material is just not tough enough though. I know they aren't marketed as being tough, bushwhacking pants and I've treated them very gently as a result, yet they've still developed some pin-prick holes. I honestly don't get who these are for. Sure, maybe thru-hikers who know they won't be encountering any bush, won't be kneeling in them and are very careful not to scuff them might enjoy these, but they are otherwise too fragile. Mammut and other brands need to create general use rain or hard shell pants for people not climbing 8000m peaks below freezing or pants so light and delicate only a small niche of people can use them. I had to give a decent rating because these are about the only rain pants I can find that fit my 6'6", 190lb frame. I bought the 48 long/tall.

Chad C

Originally reviewed on