5 oz./yd² / 172 gsm (US), 8.4 oz/Lyd (CA), 100% polyester face plaited to 60/40 polyester/cotton back (total overall garment 61/39 polyester/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-management performance Luxury, comfort and performance in one Active fit Matching flat-knit collar Stylized open placket Side vents UV 15-39 protection