5.6 oz, 100% POLYESTER DOUBLE KNIT MESH FABRICOpti-Dri technology transfers moisture away from the body to keep you cool and dry3-button placket with Callaway embossed buttonsRib knit collar and open sleeveDouble needle hemmed bottom with side ventsHeat transfer Callaway Chevron logo on back neckHeat seal Callway logo on bottom left front