Power Bags Kick Resistance Socks The most versatile resistance system ever created! Drag Socks that do so much more than normal Sox. Drag that is more than just socks. Use our Sox to add nearly every type of resistance you could need. On Feet or calves: socks drive kick higher with less knee bend, or use for drag on pull sets. On Forearms: swim with open hand or fist to improve catch and recovery On Waist: use included belt to add 1 or both Bags around waist to drive the hips up. Parachute or on a Kickboard: use the provided belts to drag as a parachute or slide over a kickboard to drag over your feet or add drag in front Patent Pending