Merrell Women's Claire Button Up Shirt, Black, Small 100% Nylon Front and Shoulders: 95% Polyester, 5% Elastane Body Imported Forward shoulder seam for comfort when carrying a pack or bag Cotton-feel, nylon woven fabric over the shoulder, front and arms for cool hiking comfort Stretchy knit tonal fabric wraps around the front for freedom of motion Roll up sleeves secured with hidden tab/button closure UPF 40+ protection Forward shoulder seam for comfort when carrying a pack or bag