4.9 oz 92% Polyester / 8% Spandex jersey fabric. Opti-Dri technology transfers moisture away from the body to keep you cool and dry. Stretch to give you full range of motion. UV Repel technology keeps skin safe from the sun's harmful rays UPF 50 . 3-button placket, self fabric collar, open sleeve Double needle hemmed bottom with side vents. Heat Seal Label provides Tag-Free Comfort. Tonal embroidered Callaway logo on right sleeve.