Dress it up or down, wear it solo or layered: the choices are yours. Plus, the long sleeve shirt features our ZnO™ fabric that embeds millions of tiny particles of zinc oxide -- the same ingredient that is used to block UVA and 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 and expand your mix-and-match options!