The Nike FREE 1.0 Cross Bionic brings advanced technology and a fun, modern look, great for high-intensity training, crossfit, boot camp, intervals, circuits, and kettle bell training. Flywire technology wraps over your foot to provide a dynamic and secure fit. Lightweight mesh upper enhances breathability, keeping your feet cool and dry. Ultra-low-to-the-ground midsole offers a barefoot-like feel for a stable foot-to-ground connection. Thin, web-rubber sole gives you reliable traction and stability. Wt. 5.2 oz.