3D Memo Foam: cushioning adapts to your foot shape for exceptional comfort, support, and blister prevention. Vibram sole Board lasting. Meteorite Rubber: Sole technology for optimal guidance even in cold terrain Metal particles mixed with special winter rubber for improved adhesion on ice vibram Scale Sole: Together with proven flexible ribs, the arrangement of the scales on this hiking sole ensures maximum grip and a rounded, gentle rolling action on all terrains. Strong against twisting and effectively supports the ankle