ExOfficio Women's Bugs Away Chas'r Long Sleeve Crew Shirt Cotton-blend Tagless label for added comfort Anti/Insect: Insect Shield finish to repel flies, ticks, mosquitoes, chiggers, midges, and ants Stretch: Stretch fabric provides maximum mobility and comfort during activity Sun Guard 30+: Specialized fabric rated with a UPF (Ultraviolet Protection Factor) absorbs and reflects harmful rays, preventing them from damaging your skin