Verdict from 4 experts and 7 user reviews

5 reasons to buy

  • The majority of Mammut Taiss Light Mid GTX reviews point out its exceptional lightness.
  • Most verified buyers rave about its beefy construction.
  • It's stiff but not bulky which makes it ideal for climbing rock, snow, and ice, according to an expert review.
  • It delivers a satisfactory grip on varied mountain terrain, another avid hiker notes.
  • Attaching crampons to these boots is a breeze, mentions an in-depth report.

2 reasons not to buy

  • The wrap-around upper tongue can sit a bit strangely when the boots are tied tight for climbing, says an expert review.
  • It has a narrow toe box, according to a few users.

Bottom line

Another premium mountaineering boot from Mammut, the Taiss Light Mid GTX gets high marks for its durable construction, superb traction, and incredible lightness. It’s a very tough and protective boot that fits varying activities on the mountain without slowing you down, as most reviews suggest. 

Even with a few negative comments on the fit, avid hikers and mountaineers unanimously favor this boot. It certainly fits the bill for anyone looking for a robust yet sleek boot for some of their toughest hikes.

Good to know

-This rugged waterproof mountaineering boot features a stretchy, breathable upper for protection, and a Gore-Tex membrane for keeping the feet dry against rain, slush, or snow.

-It has a heavy-duty Vibram outsole with large rubber lugs for enhanced grip and traction on mountain trails.

-For its cushioning system, the Mammut Taiss Light Mid GTX mountaineering boots are equipped with PU midsoles that deliver firm support.

-This boot is crampon-compatible.

This alpine boot from Mammut is constructed using the Georganic 3D technology which involves the use of materials that adapt to the contours of your feet. It’s meant to create a precise, glove-like fit that promotes natural movement. Lastly, it has a two-zone lacing system for a customized fit whenever needed.

Note, however, that the Taiss Light Mid is a relatively stiff boot as it is designed for mountaineering. Nonetheless, the stretchy upper creates a snug and soft environment for the foot.

This boot is powered by the Vibram Litebase - an innovative outsole that is as durable and aggressive as other Vibram mountaineering soles but is much thinner. Despite the substantial reduction in the thickness, it doesn’t change the depth, shape, and size of the lugs. The Taiss Light mid-top hiker has plenty of spaces between the lugs so no dirt or mud gets stuck in between. Also, the lugs are multidirectional so they grip well on different surfaces.

The Taiss Light has a midsole made of PU wedge. Among the different types of foam used in performance footwear, PU is one of the most durable. It's a highly resilient foam and unlike EVA, it doesn't compress over time. Thus, hiking boots and shoes with PU midsoles deliver long-lasting cushioning. While PU is heavier than EVA, it doesn't make the Taiss Gore-Tex boots heavier as the heaviness of the midsole is offset by the lightness of the upper and sole.

These boots have Schoeller softshell uppers made of durable fabric that is resistant to abrasion, wear, and tear. The side panels are made of Ripstop and mesh, and inside the boot is a Gore-Tex waterproof membrane that protects against rain or water. The Mammut Taiss Light mid-top hiker doesn't have insulation so they are best worn as summer alpine boots. If trekking in cold weather, it's important to wear thick socks (preferably thermal socks) for added warmth and comfort.

The Taiss Mid is classified as a B2 boot which means it is compatible with semi-automatic crampons. Completing the upper is a two-zone lacing system that allows you to adjust the tightness between the lower foot and the ankle. Thus, you can loosen up the ankle when walking on city streets or well-established trails and cinch it up when traversing vertical terrain. 


How Mammut Taiss Light Mid GTX ranks compared to all other shoes
Bottom 7% mountaineering boots
All mountaineering boots
Bottom 14% Mammut mountaineering boots
All Mammut mountaineering boots
Bottom 6% waterproof mountaineering boots
All waterproof mountaineering boots


The current trend of Mammut Taiss Light Mid GTX.
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Over the past 20 years, Paul has climbed, hiked, and ran all over the world. He has summited peaks throughout the Americas, trekked through Africa, and tested his endurance in 24-hour trail races as well as 6 marathons. On average, he runs 30-50 miles a week in the foothills of Northern Colorado. His research is regularly cited in The New York Times, Washington Post, National Geographic, etc. On top of this, Paul is leading the running shoe lab where he cuts shoes apart and analyses every detail of the shoes that you might buy.