Features:Chute open as running beginsperfect for adding resistance while runningIncrease speed、 strength、 stamina and enduranceAdjustable waist belt with velcro enclosurespecification:Color: BlackMaterial: PolyesterDiameter: 56in / 142.2cm(approx.)Adjustable Waist: 20~42in(approx.)Weight: 6.8oz / 193gPackage Content:1PCS