Speedo Big Boys' Uv 50+ Long Sleeve Rashguard 84% Nylon/16% Spandex Imported UV block the burn UPF 50+ sun protection technology Unisex sizing fits small 7-8, medium 10-12, large 14-16, extra-large 18-20 Crew neck pullover for easy on and off in easy care nylon, spandex blend Long sleeves for maximum coverage and protection Made by Speedo, the world's premier aquatics brand