5.6 oz 100% polyester double knit mesh fabric. Opti-Dri technology transfers moisture away from the body to keep you cool and dry. 3-button placket with Callaway embossed buttons. Rib knit collar. Heat seal label provides tag-free comfort. Contrast embroidered Callaway logo on right sleeve. Opti•dri™ Moisture Managemen Callaway - Men's Core Performance Long Sleeve Polo