Speed Chute Trainer...Maximize Acceleration! This speed parachute trainer allows you to maximize acceleration and top running speed through resistance and overspeed workouts. The parachute quickly improves stride length and frequency to max out top end speed. The speed chute has a quick-release function to use mid-stride for that "shot-out-of-cannon" sensation. SKLZ Speed Chute Resistance Trainer features: Maximize acceleration and top running speed through resistance and overspeed training 360* rotation belt with free motion ring allows for movement in any direction; adjustable for most sizes Quick-release belt buckle allows training with acceleration bursts Built-in mesh panels keep strings from tangling and help stabilize the chute during training 54" x 54" chute provides approximately 15-30 lbs of resistance (depending on speed of user) Adjustable belt fits most athletes Includes instructional DVD and 6-week progressive training workout plan Speed Chute...Maximize Top Running Speed!