Light and flexible here is the name of the game. Lots of mesh for breathability and Charged Cushioning® for impact protection. Just put on and run for miles. High-performance mesh is upper for easy breathability. Foam padding around the ankle and under the tongue for an incredibly comfortable fit and feel. Deluxe foam insole adapts to the foot for added underfoot comfort. Charged Cushioning® midsole uses pressed foam for maximum responsiveness and durability. Durable sole for flexibility and traction. Thrust depth 8 mm.