adidas Terrex Skychaser GTX Trail Running Shoes - AW16 Boost - Adidas' primary technology supplies energy-returning properties keeping every step charged with an endless supply of light, fast energy. GORE-TEX Extended Comfort - Prevents water for permeating the exterior, in-turn creating a drier interior. Synthetic Overlays - Add durability and support to the construction. EVA Tongue Top and Collar - Deliver an optimal fit. Speed Lacing Construction - For fast and snug lacing enabling a sock-like feel.