adidas Revenergy Boost Women's Running Shoes Synthetic Rubber sole Energy Boost Midsole - Energy returning properties keep every step charged with an endless supply of light, fast energy. Techfit Upper - Delivers natural, flexible support that adheres to the contours of the foot with a sock-like fit. Air Mesh Upper - Allows air to fully permeate the shoe's interior, for added ventilation. Welded Overlays - Support and reinforce the shoe's construction without adding undue weight. High-performance Lining - Wicks sweat away from feet, promoting a cooler and drier environment.