5.1 oz/yd2 / 172 gsm, 100% polyester face plaited to 60% polyester, 40% cotton back (total overall garment 61% polyester, 39% cotton); Proprietary dual-sided mesh pique knit constructed of fine denier wicking polyester on the outside and soft-as-cotton wicking blend on the inside; Moisture-wicking and UV protection 15-39; Hidden button-down collar with integrated collar stays; Dyed-to-match pearlized buttons; Adjustable cuffs with button placket; Double layer back yoke; Active fit; Easy care;