4.2 oz./yd, 100% Airlume pre-shrunk combed and ringspun cotton, 32 singles. Athletic Heather and Black Heather are 90/10 airlume combed and ringspun cotton/polyester. Alternate Heather Colors are 52/48 airlume combed and ringspun cotton/polyester. Relaxed fit. Low-cut armhole. Curved bottom hem. Side seams. Tear away label.