adidas Mens Energy Boost ESM J Athletic & Sneakers Yellow Mesh boosts energy-returning properties keep every step charged with an endless supply of light, fast energy techfit upper is engineered for natural, flexible support and a seamless, sock-like fit Four-way engineered stretch mesh forefoot TORSION SYSTEM for midfoot integrity; Molded midfoot and heel cage for added structure and stability ADIWEAR outsole offers the ultimate in high-wear durability