100% Polyester. Callaway Standard Collection fuses our most classic look into a roomier fit. Three-Button Placket. Rib Knit Collar. Callaway Tour Heat Seal logo on Right Sleeve. Opti-Dri: transfers moisture away from the body to aid in evaporation. Opti-Vent: fabric allows for the garment to have maximum breathability. Machine Washable. Imported