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. Combination compatible. 100% Vegan. Durably waterproof/breathable.