This adidas Y-3 Saikou features a White knitted upper with a Black neoprene sock liner contrasted with Off-White hits of suede on its overlay. A Black Boost midsole and matching rubber outsole completes the design. BOOST™ technology is a groundbreaking innovation in cushioning, delivering a maximum energy return for the ultimate running experience. BOOST™ cushioning propels you forward using the energy received for a light and fast ride. The more energy you give, the more you get.