Keep your feet cool in the adidas by Stella McCartney Climacool Sonic shoes. With a micro-perforated upper for meshlike ventilation and the energy return of boost in the forefoot. climacool? provides 360-degree cooling for the entire foot. boost 's energy-returning properties keep every step charged with an endless supply of light, fast energy. Four-way engineered open mesh and micro-perforated upper. Rubber toe bumper. Rubber outsole.