adidas Terrex Fast R GTX Walking Shoes - AW15 Outdoor-specific FORMOTION Unit - For enhanced motion control and downhill comfort. High-Abrasion Mesh and Synthetic Upper - Providing breathability and durability. Moulded EVA Tongue Top - Enhancing fit and comfort. GORE-TEX - Waterproof and breathable lining. Full-forefoot ADIPRENE+ - Enabling you to maintain propulsion and efficiency.