It s safe to say that Adidas knows a thing or two about speed, and its Men s Terrex Fast X High GTX Hiking Boots are no exception. Designed to propel you forward, the boots are fitted with an Adiprene midsole at the forefoot to keep you moving quickly. A Gore-Tex membrane provide the boots with proven waterproof, breathable performance. For stability, the Terrex s feature Adidas outdoor-specific Formotion unit to give you the stability you need when hiking through variable terrain. A durable Continental rubber sole ensures traction on slick and steep trails.