5.75-ounce 65% cotton / 35% polyester stretch plaited jersey knit - Heather gray: 59% cotton / 41% polyester stretch plaited jersey knit - Other Heathers: 60% polyester / 40% cotton stretch plaited jersey knit - Built with Force technology - FastDry technology - Stain Breaker technology - Sun protection - Smooth flatlock seams - Raglan sleeves - Ventilated side panels - Drop-tail hem - Left-chest pocket with pen stall - Tagless neck label