●82% Nylon, 18% Spandex ●Imported ●Pull On closure ●Machine Wash ●Effective UV sun protection-Boys rash guard Shirts shirts have UPF50+ sun protection to maximize protection from harmful UV rays and protect sensitive skin when playing outside in the summer. ●Quick-drying fabric - 82%Nylon+18%Spandex; elastic, soft, durable; Lightweight, breathable fabric allows moisture to evaporate quickly to keep you cool. ●Slim design - flat seams and round neckline minimize friction between the clothes and the skin to enhance the childs comfort and flexibility while playing