Free your stride in the lightweight flexibility of the Flex 2012 Run from Nike®! Ideal for the neutral runner looking for a distance trainer that offers lightweight cushioning and multidirectional flexibility for a barefoot-like training experience. Lightweight sandwich mesh upper for increased breathability and comfort. Durable and supportive leather and synthetic no-sew overlays. Mid-foot strap attaches to the laces for added support. It offers a customizable fit that accommodates a wide variety of foot shapes. Thin tongue with foam pad helps reduce pressure over the top of the foot. Padded collar for added comfort. EVA sockliner offers lightweight underfoot support. Phylite carrier delivers a resilient ride and extended durability while reducing the overall weight. Phylon core is made up of a soft, resilient foam that provides ultraplush comfort and added cushioning in the heel and ball of the foot. Molded siping is designed to function as a lateral crashpad for a smoother transition through heel-strike. Abrasion-resistant BRS 1,000 carbon rubber in the heel for heightened durability in this high-wear area. Pieces of solid rubber are strategically placed in key-wear zones for optimal traction and durability. Forefoot flex grooves allow for enhanced flexibility through propulsion. Measurements: Weight: 8 oz. Weight: 8 oz. Product measurements were taken using size 7.5, width B - Medium.