The Power Chute allows both resistance and overspeed training without a partner. Improves 2 key elements of speed- stride length and frequency. Chute opens while running for resistance. Velcro belt allows for mid-stride release during sprint for overspeed effect. This increases speed, explosiveness and acceleration. Use while running in any direction, changing directions, or on curves. It is the perfect training device for all sports! The built in mesh panels eliminate the tangling of strings found on other chutes.2 sizes for all skill levels. The panels also provide stability to reduce shifting. Constructed of all weather tear resistant fabric. Adjustable belt with storage pocket (fits 20" to 42" waist).Wt. 3 lbs