Speedo Big Boys' Fractal Logo Boom Rashguard Swim Tee 100% Polyester Imported UV Block the Burn with UPF 50+ protective fabric Loose fit swim tee for greater long wearing comfort and freedom of movement M = 10/12; L = 14/16; XL = 18/20 Great for any activity in or around the water Made by Speedo, the world's #1 swim brand