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Mammut's Monolith GTX Boot welcomes the approach, the descent, and every punishing step in between. This versatile adventure footwear weathers surprise squalls on class IV granite scrambles, and welcomes the challenge of vertical ice. Don't overspecialize with multiple expensive pairs of boots when you can use one go-to pair of workhorse alpine boots geared for high adventure.

  • Gore-Tex membrane guarantees waterproof protection while maintaining breathability
  • Motion Control technology features asymmetrical gait construction, guaranteeing stability without compromising forward flexibility
  • Hybrid shell balances support and flex for a design that is neither too rigid nor too soft
  • Base Fit system transfers force from laces all the way through the sole of the boot for an all-around secure fit and sensitivity
  • Asymmetric lacing boosts the pressure on your big toe when extra control and precision is needed
  • Mammut SC Footbed provides targeted cushioning for optimal support underfoot
  • Crampon-compatible Vibram sole grips tightly on slanted surfaces and accommodates your strap-on spikes with ease
  • Reviews
  • Q & A

What do you think about this product?

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Not a serious mountaineering boot

  • Familiarity:I've used it several times
  • Fit:True to size

I bought these boots since they were on a good sale for use in Alaska for use as a Glacier guide on the Juneau Icefield. The boots are comfortable and look cool, but after 12 days of use with crampons the soles are already starting peel off on the heels. This is due to the soft foam on the heel where the crampons rub the boot. Other boot makers make this area stiff durable plastic for this exact reason. Verdict: great boot for hiking with the very occasional crampon use, but if you will be using crampons frequently do not get these boots

An Excellent General Mountaineering Boot

  • Familiarity:I've put it through the wringer
  • Fit:True to size

Fit is old school. I wear Two medium thickness boot socks, usually, and size up one full European size.

This is my go to boot for pretty much everything except dead of winter and ice climbing although they will do a bit of that well enough.

I agree with tscheezy's review except the lace pressure criticism, but then I take care of that with the sock combination above. I don't have a problem with the weight. You do get a more durable boot in return for the extra weight compared to the Charmoz and S Evo.

Frankestein's boot

  • Familiarity:I've used it once or twice and have initial impressions
  • Fit:True to size

Big, tough, heavy duty boot that was uncomfortable and hurt my big toe on my right foot. It might be worth mentioning this boot is blue on the other side of the green and the sole is pictured incorrectly. Fit my 9.5E foot snug with some toe rub. This boot might be great for some but not for me. I didn't like the lacing system little hard to tighten up at the top didn't stay tied even with double knot. It was cool looking. 2.5stars

good for the price

  • Familiarity:I've put it through the wringer
  • Fit:True to size

Pros: as previously mentioned, lacing can be fine-tuned, supportive, solid, works with my existing Grivel AirTec crampons, price.

Cons: a little loose around the ankle and you can feel the lacing eyelets dig-in when you cinch up the strings. they should've just stuck with simple steel eyelets on the lacing.

Solid and supportive so far

    These boots are a bit heavy (heavier than Scarpa Charmoz, Salewa Ravens, La Sportiva Trango S, etc), but also offer better support than most of those. The shank seems to run all the way to the toe and the sole flexes when front pointing less than those other boots. There is still some flex, but most of those other boots offer 3/4 shanks while the Mammuts are pretty stiff right to the toe. However, you can still walk nicely in these. It's not like being in plastic boots. The ankle is also a bit more supportive than the (new) Charmoz and the Trango S boots. The Mammuts are similar to the old Charmoz boots and the current Salewa Ravens. I like supportive uppers so I dislike what they have done to the new model Charmoz and never liked the Trango Ss much. Most of those boots now offer reasonably wide lasts, and this boot does too. The lacing can be fine tuned pretty easily on these Mammuts, though the tongue is sort of thin and lacking in padding. I can feel the laces and lace hardware somewhat so I cut up some thick felt insoles to make second interior tongues, and that has fixed the issue for me. I appreciate the fact that they don't have the Vibram Mulaz sole like all the other light alpine boots nowadays since I don't think it grips well on much other than rock. If they could knock the weight of the Mammuts down a little that would be nice though. Not sure why they are sort of porky other than the beefier sole rubber and the longer shank.

    A solid, supportive boot. I am going to subtract one star for the weight and thin tongue.