Opti-Dri technology transfers moisture away from the body to keep you cool and dry. Opti- Vent fabric allows this garment to have maximum breathability. 100% polyester single knit mesh back panel provides cooling comfort all day. Double-needle hemmed bottom with side vents 3-button contrast placket with Callaway embossed buttons adds a touch of pop. Rib-knit collar. Embossed stripe printing on the chest and athletic seam details. Heat seal label provides tag-free comfort Contrast raised rubber heat transfer Chevron on right sleeve.