With 360° rotating quick release buckle, it is firm and , with high flexibility and no twisting. Colour:Black Material:Polyester Package Contents: 1set x Swimming resistance umbrella (small x1+medium x1+large x1) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Exquisite workmanship, beautiful appearance, small and portable size, providing you great using experience. Sports & Outdoors/Sports/Other Sports//Accessories/Parachutes [Applicable People]Hook and loop design, adjustable size, suitable for different groups of people, swim resistance training belt is suitable for children and women or swimming beginners. [Working Principle]This swim parachute imitates the aerodynamics of the parachute and strives to achieve relative resistance when exercising in the water, making swimming training more effective. [Good Function]This swim parachute can exercise swimming strength and improve swimming explosiveness