4.7 OZ. 92% polyester. 8% spandex double knit fabric. Opti-Dri technology transfers moisture away from the body to keep you cool and dry. UV Block technology keeps skin safe from the sun's harmful rays. UPF 15+. Self collar Stretch fabric moves with you to increase your range of motion Double needle hemmed bottom with side vents. 3-button placket with Callaway embossed buttons on men's style. Tonal embroidered Chevron inside placket on men's style.