BOOTIE CONSTRUCTION-Bootie construction provides step in comfort and 360-degrees of support around the foot. PWRSTRAP FIT SYSTEM-Advanced nylon webbing straps integrated with the lacing system that wrap the foot to provide a secure, personalized fit. SOFTFOAM-Dual Density insole provides two unique layers of cushioning for customized comfort, fit and long lasting durability. FUSION FOAM-Mix of super soft EVA foam and ultra-responsive rubber combine to provide energy return and cushioning to keep you comfortable all day long.