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Tie it down before it floats away.

You're three pitches into your climb, and between the burn in your forearms and the raging sun, you are starting to feel the heat. Mammut designed the Zephir Harness with Dyneema webbing for a lightweight, comfortable feel and large ventilation openings for extra breathability on long climbs.

  • Split webbing technology is lightweight and takes your weight over a wider area so you won't feel like the straps are digging into your skin
  • Two-part strap passage distributes weight evenly between the hip belt and leg loops for more comfort
  • Ventilation openings keeps fresh air flowing so you don't feel sweaty under your harness
  • Lightweight protector keeps your rope shielded from abrasion in the tie-in loops
  • Aluminum Slide-Bloc buckle keeps weight low and fit adjustments easy

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Mammut Zephir Harness - Men's

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Here's what others have to say...

3 5

A lot smaller than expected

  • Familiarity: I returned this product before using it

I got a Medium Zephir, I usually wear a M Petzl Sama - I have 30" waist, 140lb 5'8" lean guy.

1. God, it is light.
2. It is surprisingly comfortable for the width of loops and lack of padding.

1. The leg loops do ride quite high into the crotch area (mentioned by other review). I extended the elastic strings at the back to max, and it still held the leg loops up against my other 'chalk bag'.

2. The leg loops are very narrow on the inside of the thigh, but oddly, very wide on the outside of the thigh where there isn't much pressure - added to discomfort slightly.

3. The fit was weird for me. The waist loop end 'slips' into a sleeve to keep things together, but it didn't really fit together for me, and it just bunched up. Maybe it would be different if I got a large.

4. The 'dyneema' connecting the leg loops to the belay loop is very narrow! I guess I trust them... but err... jesus they are narrow! and its thinner than a dyneema sling (but wider).

5. The belay loop is pretty small, as are the two points for rope tie in. I'm not sure I'd fit two twins in there + my PAS (and my second PAS! b/c I like to lobster claw). I'm not sure there's a lot of work area here for long climbs, or multipitch.

6. The rear gearloops are like vestigial structures... They might as well just fall off. And the front gear loops are pretty far back. They also flop around and aren't held out from the body. I haven't racked gear on the harness, but I imagine, it wouldn't be as easy as the BD's moulded gear loops.

Summary: Overall, it is a very full-featured super-light harness. It would be a contender for alpine situations where I want fast and light, but also want to rack some gear - I feel like the Petzl Hirundos would be in the same class. I would avoid this harness for gym, sport, multipitch, big-wall or trad. It sacrifices too much on the belay loop size, comfort, and racking.

4 5


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

I have initially tried the harness out this weekend at an indoors rock wall place in Colorado Springs. Although I was wearing a size medium and I need to step up to a large, (one inch off) the harness seemed very comfortable while ascending and descending .

If the size medium ran tight and was comfortable, I am excited to climb in my size large.

For sizing purposes, I wear size 32 jeans in Levi.
The mammut harness's seem to put just barely into the large category.

REMEMBER the harness waist sits higher than your pant waist. This is just to give you an idea of size and where I am coming form with it.

4 Stars for being SUPER lite and comfortable. Probably will be bumped to 5 once I get familiar with the L size.

2 5

Broke on second day

The plastic piece that attaches to the belay loop broke while i was working a sport route. The piece broke when i was trying to pull a roof and could not make the clip. The falls were short but i took a few. This is not a safety issue, but definitely effects the performance (leg loops slide now). The harness is light and comfortable, but definitely not built to climb hard in. Harness is going back, will probably get a BD or an arc'teryx

5 5


Great harness, the best Mammut has put out. Super light and breathable. I've been using it for everything from sport climbing, alpine climbing, ski touring and mountaineering. Even with fixed leg loops, it has great adjustability and fits well over boardshorts and a down suit. The slide-bloc buckle is fast and easy, no need to double back. Packs down small in the pack for the approach. The gear loops lay flat so you dont feel them under your pack waistbelt and are big enough to allow for climbing without a shoulder sling.