The two for one double layer Marmot Men's Folsom Reversible Long Sleeve Shirt makes lightweight travel even lighter. This reversible shirt has a blend of cozy cotton and stretch for better mobility. Flat locked seam construction maximizes comfort. Garment washed for a softer, against the skin feel. Constructed of 93% cotton, 7% elastane jersey fabric. Comfortable, breathable, lightweight knit fabric. Ultraviolet protection factor UPF 30. Double layer reversible knit with heather. Stretch for increased mobility. Cotton for comfort. Flat locked seams for added comfort. Garment washed for soft hand. Regular fit. Avg. weight: 1 lb. 0.2 oz. Import.