SPF Adult Long Sleeve Sun Protective UPF 50+ T-Shirt 100-percent-cotton Perfect Weight - Perfect Fit - Perfect Price Pre-shrunk for a perfect fit, wash after wash - Machine wash and dry Blocks in excess of 97% of ultraviolet rays Double stitched for extra strength to last for seasons to come Comfortable 1/2 inch ribbed collar with shoulder to shoulder taping that ensures the seams lay flat