Platypus Australia: Every boy deserves a pair of comfortable square leg briefs with an elastic waist that is very popular for swimming and poolside. UPF 50+ 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 shorts80% Nylon and 20% LYCRA XTRA LIFE Hand wash only Shop At House Of Fraser