Platypus: 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, ultra chlorine resistant, breathable and quick drying.Swimming shorts80% Nylon, 20% LYCRAHand wash only Shop At House Of Fraser