Common Purpose Little Boys' Explorer UPF50 Long Sleeve Rash Guard, 6 Imported UPF 50 Sun Protective Fabric. Blocks UV A/B effectively, recommended by the Skin Cancer Foundation. 84% Nylon 16% Lycra Xtra-fine, for "barely there" comfort. Tight Fit - order one size up for a looser fit. Hand Wash. Common Purpose Clothing is commited to innovation and thinking-out-of-the box-design in the world of sun protection, the promotion of fair wages and healthy working conditions for women in the manufacturing industry High neck for more protection and pull over for easy on and off. Long sleeved Navy blue for an extra level of UPF protection