Strap on the Lifeline Monster Walk 20 lb Ankle Cuffs to train those commonly overlooked lower body muscles. The 30-inch ring is made from flexible latex, providing constant tension while you perform lunges, extensions, leg curls and more. Over time, the resistance helps improve your speed, balance and strength. Lifeline Monster Walk 20 lb Ankle Cuffs Black/Red - Hand Exer. Equip. at Academy Sports