adidas Terrex Boost Trail Running Shoes - AW15 Boost - Adidas' primary technology supplies energy-returning properties keeping every step charged with an endless supply of light, fast energy. Stretch Mesh Upper - Allows air to penetrate the upper, providing breathability. 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.