Recommended for: fast and light technical mountain climbing and glacier travel. A breakthrough in alpine boot design, this next-gen concept was developed in conjunction with alpinist David Göttler who sought a super-lightweight high altitude training/acclimatization boot. The flexible LOWA REPTEX abrasion-resistant upper is injected with PU “scales” that mimic a reptile’s protective skin, thus replacing a traditional heavy rubber rand, while the VIBRAM® Alp Trac® SL sole features Litebase technology that substantially reduces the weight and thickness of the sole without affecting its traction or wear resistance. Combination crampon compatible. 100% vegan. Durably waterproof/breathable.