Material: Rubber Size S: 50cm, suitable for infants under 5 years old, the head circumference should be measured accurately, and the elasticity can be stretched 7cm. Size M: 55cm, suitable for ordinary people or children. Size L: 59cm, suitable for people with a head circumference greater than or equal to 59cm. Color: Size S pink/blue; Size M purple/blue; Size L purple/black Package List 1*Swimming Headband 11. Swimming headband: Waterproof ear protection, soft and close-fitting, breathable and comfortable, durable. 22. Detail display: The hook and loop fastener sticks strongly to improve the adhesion and is not easy to fall off. The waterproof elastic fabric is waterproof and comfortable. 33. Designed to fix earplugs during water sports: Very suitable for ear tubes, eardrum perforations, myotubes, otitis tubes, otitis mediators and otitis externa. 44. Help prevent swimming ears. It is very suitable for swimming, bathing, surfing, water skiing, canoeing and kayaking. Ideal for swimming pools, lakes or beaches. Ensure ear protection. 55. Package included: 1*Swimming headband. Practical and stable, easy to wear. Perfect for swimming diving bathing drifting activities.