adidas Outdoor Terrex Fast X GTX Hiking Shoe - Men's Carbon/Black/Light Scarlet 11 Synthetic Lining: Gore-Tex extended comfort footwear Inlay: Molded Ortholite sockliner Midsole: Full forefoot adiPRENE+ for forefoot propulsion and efficiency Outdoor specific Formotion unit for enhanced motion control and downhill comfort Outsole: Continental rubber for extraordinary grip