4.5-ounce, 100% ring spun US cotton 90/10 ring spun cotton/polyester (Antique Cherry Red, Antique Heliconia, Antique Sapphire, and Sport Grey) 50/50 ring spun cotton/polyester (Graphite Heather) 65/35 polyester/ring spun cotton (Dark Heather, Heather Berry, Heather Cardinal, Heather Galapagos Blue, Heather Heliconia, Heather Indigo, Heather Irish Green, Heather Maroon, Heather Military Green, Heather Navy, Heather Orange, Heather Purple, Heather Radiant Orchid, Heather Royal, Heather Red and Heather Sapphire) Non-dyed fabric with visible specks of fibers and cotton seeds (Natural) Non-topstitched 5/8" rib collar Taped neck and shoulders Modern classic fit, seamless body Double-needle sleeves and hem Recycled, high-performing black tear-away label