Breathable mesh & foam upper designed with overlays that keep your midfoot locked in. Molded 4D Foam® footbed conforms to your foot's exact shape, eliminating slippage. Strategically placed flex grooves in the midsole deliver a cushioned ride that actually moves along with your foot. Full-length Micro G® foam creates an incredibly lightweight and responsive ride. Strategically placed rubber traction covers high impact zones for greater durability with less weight.