mesh Dynamic Fit technology locks down the foot. Engineered mesh provides targeted ventilation and support. Dynamic Support system in the midsole provides a smooth transition. Full inner mesh bootie wraps the foot to enhance breathability and provide a sock-like fit. Notches on each side of the tongue allow for easy on and off. Compression-molded Phylon on the medial side and Cushlon foam on the lateral side are fused together to create a dual-density cushioning system.