❤soft cloth outside, pearl foam inside, fully sealed waterproof membrane in middle(easy dry)❤【Non-inflate】No need pump. Never leakage and sink. Outside is cloth, inside is pearl-foam. One-press security buckles-lock offers more protection and convenient operation. Crotch straps design avoids slipping.❤Suitable for 0-12 months 0-10KG baby.1.Size (M) Diameter 9cm, is suitable for babies under 6 kg.2.Size (L) Diameter 10.5cm,is suitable for babies weighing 6-10 kg.