Get ready for the best your running shoes will ever feel. SuperRev(TM) foam cushions every impact and delivers springy bounce as you lift off, maximizing energy return and durability. Flexible arch shape works with your body's natural biomechanics and adapts to the movement of the foot. Designed to replace the removable liner in moderate to roomy running shoes. FEATURES AND BENEFITS Contoured arch support enhances foot biomechanics Flexible structure adapts to the movement of the foot Heel cushioning protects against ground impact Moisturewick(TM) top cover helps reduce odors and keeps feet fresh SuperRev(TM) foam increases energy return Energized cushioning lands soft and springs back fast Superfeet insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first Arch Height: All Arch Heights Insole Thickness: Max Underfoot Cushioning: Middle