AGPtek&reg; Speed Training Resistance Parachute - Medium (48" Size), 15-20 lbs of resistance, Fit up to a 42" waist 48" diameter, Also available in Medium (48") and Large (56") 15-20 lbs of resistance Fits all sizes (up to a 42" waist), Quick Release for overspeed training. Fully functional unit includes parachute and belt. Suggestion:long-distance running.