PERFECT SIZE - 90cm diameter, 5-15KG of resistance. ADJUSTABLE BELT - Velcro closures waist belt for all body types of users, (up to a 42" waist) ,The belt rotates 360 degrees and has a free motion ring, meaning you can sprint in any direction. GREAT HELPING FOR RUNNER -Provides excellent resistance training for improved speed, stamina, strength, and acceleration Chute releases while running for overspeed training. DURABLE -Made of high quality parachute cloth, Built-in mesh panels keep strings from tangling and helps stabilize the chute during training. MULIT USED -Whether youre in track and field, football, soccer, basketball, or any other sport, your speed will improve with the use of this resistance training chute, Best for long-distance running.