Platypus Australia: Our sporty 3/4 Jammer protects skin from the sun's damaging UV rays and eliminates rashes when worn under boardshorts, allowing boys to be active all day long. UPF50+ offers excellent sun protection, the highest possible, blocking out more than 97.5% of the sun's harmful rays. Fabric is a high quality Matt Nylon LYCRA XTRA LIFE , ultra chlorine resistant, breathable and quick drying.Swimming costume80% Nylon and 20% LYCRA XTRA LIFE Hand wash only Shop At House Of Fraser