3.5 oz./yd, 100% microfiber performance polyester. Heather Grey is 4.7 oz.. Paragon Plus odor/moisture management. Wrinkle-resistant finish. Detailed stitching. Double-needle stitched self-fabric neck, sleeves and bottom hem. Raglan shoulder, inset sleeves. Side seams. UPF 50+ protection (Heather Grey is 30). Tear away label.