5.3 oz., 90% polyester/ 10% spandex french terry 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. ¼ zip with Callaway logo rubber zipper pull. Contrast binding detail at shoulder and cuffs. Contrast embroidered Callaway logo on right sleeve