Product Details + 4.3 oz, 100% POLYESTER DOUBLE KNIT JACQUARD FABRICOpti-Dri technology transfers moisture away from the body to keep you cool and dryUV Repel technology keeps skin safe from the sun's harmful rays UPF 50 Self-fabric collar5-button placket with Callaway embossed buttonsRounded bottom with double needle stitching and side ventsHeat seal label provides tag-free comfortContrast heat seal Callaway Cheveron logo on back neck