NIKE Flex 2015 Run (PS) #724989-002 leather-and-mesh UPPER: Internal forefoot innersleeve construction give a secure fit, breathable lightweight midfoot support and asymmetrical design for an anatomical fit. MIDSOLE: Soft Phylon core midsole gives great cushioning right where you need it. OUTSOLE: Articulated Phylite carrier midsole provides flexible lightweight cushioning with great durability. This flexible and lightweight shoe gives you a minimal feel with cushioning to go the distance.