White, 4.3-ounce (145 GSM) 100% soft spun cotton, 30 singles 50/50 soft spun cotton/polyester (Neons, Heathered Charcoal, Heathered Royal, Heathered Navy, Military Green Frost, New Heather Red) 90/10 soft spun cotton/polyester (Heather Grey) 98/2 soft spun cotton/polyester (White Heather) Slightly slimmer body and shorter sleeves 1x1 rib knit neck.