4.2 oz./yd2, 100% airlume combed and ringspun cotton, 32 singles. Athletic Heather is 90/10 airlume combed and ringspun cotton/polyester. Alternate Heathers are 52/48 airlume combed and ringspun cotton/polyester. Left chest pocket. Retail fit. Unisex sizing. Side seams. Tear away label. Available in colorblock options (Shirt/ Pocket).