Quality Material: Swim paddles are made of pp and silicone. It's lightweight reduces the additional force, and helps swim faster. Durable and pliable, feel smooth, convenient to wear and no squeezing feelings. Practical Design: Swim paddles for lap swimming with broad-blade design and have many drainage holes, helps reduce the resistance in the water to promote your performance, and conductive to the increase of arm strength and swimming speeds. Adjustable Straps: Strong flexibility elastic silicone wrist and finger straps, won't hinder the blood flow in palm, the length of the strap adjusts the palm to the most comfortable state. Widely Application: Fits a variety of adults, teens, girls and boys. Great training aid for professional swimmers who wants to maintain and correct freestyle stokes mechanics. Help you practice your swimming, freestyle, backstroke, breaststroke and butterfly. 3 Size Available: S(Heigh 15cm/ Width 14.5cm) for kids, M(Heigh 19cm/ Width 17.5cm) for women and teenagers, L(Heigh 22cm/ Width 20.5cm) for men.