Gain speed, power and explosiveness by adding resistance training to your cardio workout. SPARQ Parachutes create the drag necessary to force athletes to push themselves harder to achieve speed. Medium = 10 lbs of force, Large = 15 lbs of force. Easy step-in belt was designed based on observation of athletes spending too much time messing with buckles and belt adjustment. The tri-ring provides improved chute tracking. Improved heavy duty webbing parachute lead. 2X coated, heavy duty veil fabric provides improved durability. Comes with carry bag.