Speedo Kids' Begin to Swim Fabric Arm Bands polyester Dual chamber heavy duty fabric inflatable arm bands to assist in flotation Soft polyester material provides added comfort UV 50+ "Block the Burn" protection from the sun's harmful UVA and UVB rays A Level Two in Speedo's three tiered Begin to Swim program to introduce children to swimming recommended 2 to 12 years old, with max weight of 110 lbs