5.3 oz, 90% POLYESTER / 10% SPANDEX FRENCH TERRY KNIT FABRICOpti-dry 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 50Stretch fabric moves with you to increase range of motion1/4 zip with Callaway logo rubber zipper pullContrast binding detail at shoulder and cuffsContrast embroidered Callaway logo on right sleeve