MIZUNO ENERZY (FOAM): Offering versatility in its application, while still maintaining softness and resilience. It will help enhance performance capabilities. U4ic Midsole: Delivers optimal shock reduction, durability, and a superior ride. Innovatively light, well cushioned, responsive, and resilient. Foam Wave: A Wave of comfort made of 2 layers of foam. Top layer is U4icX and bottom layer Mizuno Enerzy Foam Wave: A Wave of comfort made of 2 layers of foam. Top layer is U4icX and bottom layer Mizuno Enerzy Woven Upper: Soft, breathable, light woven material.