Deckers X Lab K-ST 21 Low Black & White Sneakers Men's Size 10 Hypersneaker Excellent Pre-owned Condition Please see photos for approximate measurements and product details Handled with care in nonsmoking home 5-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.