Features: -Made of EVA foam, it is non-sticky, non-absorbent, optimally comfortable and can bear a load of 10~30kg. -It is composed of three colors: blue, red and yellow. The colors are bright and very eye-catching. -Perfect for children who are just learning to swim and whose arm circumference is less than 3.15in. -No need to inflate before use, easy to use, and can increase the safety of children in water. -It is only suitable for children to learn swimming and can only be used as a swimming aid, not for lifesaving. Specification: Material: EVA Colour: as shown Diameter: 18.5cm/7.28in Package Included: 6x Swimming arm rings .