Features1EVA Material: The back float swim trainer is made of EVA material, which is light and comfortable, wear resistant and durable. 2Fixing Buckle: The back float swim trainer comes with a sturdy buckle, comfortable to use, and can be used with confidence. 3 Layer Design: Separate 3 pieces allows for free adjustment, so you can better learn the swimming step by step and improve your skills. 4Light to Float: The back float swim trainer is lightweight and floats stably, which is impermeable and break resistant. 5Swimming Tool: The back float swim trainer helps children or adults learn to swim and provides them with confidence and safety in the water.SpecificationItem Type: Back FloatMaterial: EVAProduct Size: Approx. 22 x 18 x 8cm / 8.66 x 7.09 x 3.15in. There may be a small error in manual measurement. It is recommended to use below 90kg. Application: For beginners of all ages, for swimming training. Package List1 xBack Float (Random Color)