Konges Slojd life jackets are equipped with internal foam rods that can be adjusted according to the child's abilities and needs. The foam rods can easily be removed individually as the little beginner swimmers develop their swimming skills. Always remove the bars in pairs, starting with 1 and 1, then 2 and 2 and so on until your child is fully accustomed to swimming independently. Made from 80 % neoprene and 20 % polyester. 1-2 years: H: 32 cm x W: 27.5 cm x L: 3.4 cm 2-3 years: H: 36 cm x W: 29 cm x L: 3.4 cm 3-6 years: H: 39 cm x W: 31 cm x L: 3.4 cm Size range: 11-15 kg/ 24-33 lbs - 12-24 months 15-19 kg/ 33-41 lbs - 24-36 months 19-30 kg/ 41-66 lbs - 3-6 years