【Premium Material】: The swimming kickboard is made of high quality EVA material, which is lightweight, can float, and is durable, which is very suitable Compatible withlearning swimming. 【Training Aid】: The swimming back foam floating is the perfect prop Compatible withswimming exercise, it can train your upper body in the water. It keeps the legs afloat and allows you to focus your arms Compatible withthe stroke. 【Adjustable】: The foam pull buoy float is designed in 4 separate parts, flexible and detachable. Beginners can choose how many floating boards to use to adjust the buoyancy according to their personal situation. 【Wide Application】: The back float board has a wide range of uses, and it can be used by children, teenagers and adults. Suitable Compatible withswimming pool training and seaside playing, etc. 【Ideal Gift】: The training swimming aid is a great gift Compatible withswimming beginners, pool exercise, swimming enthusiasts, and playing outdoors in summer. Specification: Material: EVA Size Chart: S: 18cmx21cmx8cm/7.09inchx8.27inchx3.15inch Fits Weight: Below 50kg M: 21cmx26cmx8cm/8.27inchx10.24inchx3.15inch Fits Weight: 50kg-120kg L: 26cmx31cmx8cm/10.24inchx12.20inchx3.15inch Fits Weight: 120kg-220kg Package Includes: 1 Swimming Kickboard Note: Please allow slightly errors due to manual measurement and different monitors.