4.7 oz, 92% POLYESTER / 8% SPANDEX BLEND JERSEY KNIT FABRIC Opti-Dri technology transfers moisture away from the body to keep you cool and dry UV Repel technology keeps skin safe from the sun's harmful rays UPF 50 Stretch fabric moves with you to increase your range of motion Self-fabric collar 3-button placket with Callaway embossed buttons Double needle hemmed bottom with side vents Heat seal label provides tag-free comfort Tonal embroidered Callaway logo on right sleeve