6 oz/yd² / 195 gsm, 100% recycled polyester Coolcore® pique; Coolcore® technology is chemical-free, mechanically engineered performance that doesn't wash out; Moisture wicking, thermal regulating, UV protection with no topical treatments; Sustainable fabric manufacturing practices. Learn more at Coolcore.com; Self-fabric collar with integrated collar stays; Matching knit cuffs; Side vents