The Taiss Light Mid GTX Mountaineering Boot is a lighter mountaineering boot from Mammut, and it still provides us with rugged protection from any condition, whether we're climbing rock, ice, or snow. GORE-TEX Performance Comfort offers burly waterproof protection as well as performance-oriented breathability for hoofing it up the mountain. The upper is composed of Schoeller's stretchy, breathable softshell material, and Mammut's Georganic 3D technology fits the upper precisely to the contours of your foot shape. Underfoot, the Taiss features Vibram's Ascension Litebase sole for reliable traction on various terrain, including crampon compatibility.