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Top out at or above altitude.

Reaching the summit brings about a sense of clandestine euphoria; you wandered near and far to surpass self imposed challenges, ones only further assisted by the Mammut Zephir Altitude Harness. Designed specifically for alpine pursuits and ski-touring endeavors, the Zephir Altitude weighs in at a mere 7.5 ounces. This harness owes its incredible light weight to Mammut's innovative Split Webbing technology that splits one piece of webbing in two sections to distribute your body's pressure evenly throughout the entire harness without using additional materials. This also allows for extraordinary ventilation and breathability throughout the waist and legs so you barely feel this harness at all while you climb and ski.

The Zephir Altitude also features durable Dyneema webbing constructed in the leg loops that gives it similar protection to those bulky and heavy harnesses. A Click-buckle at the waist lets you quickly put on or take off this harness in critical moments on the mountain. You can adjust the legs to an ideal fit regardless of how many layers you have on, and clips at the legs and backside allow drop-seat functionality. Additionally, the Zephir Altitude can be easily worn with a backpack with a hip belt, making it a highly versatile and dependable piece to have in your gear-quiver. With the two gear loops and attachments for four ice screw carabiners, you have just the right amount of gear to make your alpine ascent comfortably.

  • Split Webbing technology
  • Dyneema webbing
  • Click-buckle at waist
  • Clip buckles at adjustable legs
  • Functional Drop Seat buckle
  • Two gear loops
  • Attachments for four ice screw carabiners
  • Reviews
  • Q & A
Unanswered Question

Where is this harness made?


  • Familiarity: I've used it once or twice and have initial impressions

Used this harness on the Sulphide Glacier route on Mt. Shuksan and it was the right tool for the Job. For the hike in it folds up so small that it takes up barely any space and it's significantly lighter than my standard climbing harness. Easy to get on and off while wearing crampons and is barely noticeable when walking and wearing a pack. That being said it felt very secure during the long series of rappels down from the summit. Special thanks to Emily at Backcountry for suggesting this harness as the recommendation was spot on. Looking forward to using it in the White Mountains this winter and in Ecuador in the spring.


Yes! Thank you so much for posting this review and photo, Robert (and for the shout out). This is very helpful for our community, and it's cool to see a piece of the Shuksan mountain.


  • Familiarity: I gave it as a gift but have feedback to share

This harness does its job and is quite easy on/off. Lightweight and relatively comfortable considering its purpose

Buckle Up Buckaroo

    From my last review of the harness, the fun my family and friends like to have.. And the PC nature of the overly sensitive people who are on this site.. Buckle Up Buckaroo.

    Mountaineering harnesses are supposed to be simple, mountaineering harnesses need to be able to be easily put on and taken off, even over large layers of clothing.

    This harness does that.

    Do you want to use it for rock climbing? Do you want to be suspended from it for hours on end? No, there are better harnesses for that.

    For having a harness that is easy to use, is light and comfortable to wear.. Yeah, this is a great mountaineering harness.

    The main strap system is ingenious and allows you to get the harness on in no time flat and so easy adjust . So many harnesses are such a pain the ass.

    I really like it.

      I was the center of attention and jokes being made at Christmas morning.

      " Oh look, you got one of those lingerie garters for Christmas.. That is very sexy.."

      "Is that what Caitlyn Jenner wears to hide her junk?"

      Yeah, yeah.. I do love my family even with the all the jokes.

      For mountaineering this is a great harness. The easiest harness I have seen and used to take on and off while just standing there.

      So.. A great harness that makes you look like a sexy transexual hiding their junk. Things could be worse.