The Sierra Stripe Long Sleeve brings the casual comfort of a lightweight, all-cotton flannel in a slim profile and three flattering colors. With both UPF 50+ protection and subtle tonal stripe styling, the Sierra Stripe works just as well in the woods and as at the dinner table. 100% cotton. Men's brushed cotton flannel shirt in tonal stripe, UPF 50+, garment washed, drop-in button closure chest pocket, shirt tail hem, tonal stitching details, contrast fabric back yoke. Material: Cotton.