Upper: Nubuck 1,6 mm, with SCARPA design.Lining: GORE-TEX Performance Comfort for a greater warm, comfort and waterproofness.Sole: Bi-density sole with ex points to help boot reactivity on dynamic walking.PU insert in low density for shock-absorbing (1st injection) FLEX POINTS to help foot flexion and reactivity of dynamic walks.MIDSOLE PU in medium density for more support and stability (2nd injection).PU in medium/high density for VIBRAM rubber outsole support and stability