Searching for sun shirts that'll keep up with your busy kids? Our Boy's ZnO Long-sleeve T-Shirt is a solid choice and a great value. Wear it solo or layered: as flexible as you need it to be. Plus, the shirt features our most advanced fabric technology called ZnO SUNTECT®. ZnO SUNTECT® embeds millions of tiny particles of zinc oxide -- the same ingredient that is used to block UVA & UVB in better sunscreens and to treat mild skin irritations and burns -- into every fiber. These ZnO particles cannot wash or wear out. Buy several colors for those long summer days!