The Sapuen High GTX is the right choice on all kinds of terrain. Mammut Flextron® technology supports the natural rolling movement of the foot and thus more efficient use of energy when hiking and mountaineering, while Mammut Georganic® 3D technology guarantees maximum comfort. All components in contact with the foot are anatomically shaped with great precision while the classic tongue construction offers easy entry. Optimized for hiking: a Vibram rubber blend for secure grip on outdoor surfaces and a sole design that supports self-cleaning. The waterproof GORE-TEX membrane dry feet.Features:- Elastic knitted sock construction- 3D Memo Foam: cushioning adapts to your foot shape for exceptional comfort, support, and blister prevention.Specifications:- Suitable for: Mountain Training, Hiking- Weight: 470 g- Flex index: A6- Lace system: Standard lacing- Soles: Vibram® Flextron II- Material: Double Engineered Mesh- Lining: GORE-TEX Footwear- Heel drop: 10 mmTechnology:GORE-TEX:- Elastic GORE-TEX Tongue ConstructionVibram:- The Vibram sole offers great grip for surefooted navigation – even on the roughest terrain.