Deckers X Lab K-ST 21 Low Black & White Sneakers Men's Size 10 HypersneakerExcellent Pre-owned ConditionPlease see photos for approximate measurements and product detailsHandled with care in nonsmoking home5-star seller; fast shipper*I consider all reasonable offers!The K-ST 21 "hypersneaker," a whole new breed of sneakers designed to make motion more efficient and enjoyable. At the core of the new K-ST 21 is the Carbon Bow Technology suspension system, new technology from Deckers X Lab designed to transform vertical landing energy into forward motion. The carbon suspension system is uniquely shaped with the goal of capturing body load and providing extra arch support for a smooth suspension effect, while the front arms and curved surface assist with forwarding rolling motion.The suspension system complements the SwallowTail heel, a wide base designed to capture ground contact early and provide a super smooth, progressive, and stable platform for movement.