1, Premium Quality: It is made of environmental friendly PVC material with thickness of 0.28mm. with waterproof, non-toxic and durable properties. The process and design meet the requirements of international toy safety standards. Inner diameter 19cm, outer diameter 55cm 2, Great design: Our swimming baby body is equipped with a comfortable backrest, which ensures a optimal posture. Safety and independence in the water will give your baby a pleasant swim. 3, simple and comfortable: the design of the double-deck air chamber makes it easy to inflate and deflate, inflating first the small air chamber, then inflating the large airbag. Easy to fold for easy storage and transport. 4, dual airbag: Can be split into two swimming rings. If the child is tall and cannot use the small airbag, this can be removed and the large airbag used. A swimming ring is available in two sizes, economical and practical. Accompanied the child to grow.