Designed to provide a lightweight and minimal feel on your feet, the Wilson Kaos Swift 1.5 has improved the fit compared to the previous version, and provides more support with an updated Endofit. The new upper material features an innovative bi-dimensional mesh construction to increase the support, and improves ventilation. The midsole combines Wilson's RDST and EVA foam to give a responsive feel and reduce harsh shock. Kaos chassis is in the mid-foot for lateral stability, while the Duralast rubber compound on the outsole, adds traction and durability for a variety of court types. Upper: Bi-lateral mesh construction offers lightweight support, and comfortable fit with enhanced flexibility. Midsole: Lightweight EVA midsole provides a blend of cushioning and low-to-the- ground court feel. R- DST+ technology in the heel injects added cushioning and energy return for explosive movements. Outsole: Updated Duralast rubber outsole in a modified herringbone tread pattern offers traction and durability on variety of court surfaces. Color: Navy / Royal Fit Details Length: True to size Width: Medium Arch: Medium Break-in: None Weight: 324 grams (US size 10.0)