4.2 oz./yd, 52/48 Airlume combed and ringspun cotton/polyester, 32 singles. Athletic Heather and Black Heather are 90/10 Airlume combed and ringspun cotton/polyester, 32 singles. Heather Prisms are 99/1 Airlume combed and ringspun cotton/polyester, 30 singles. Relaxed fit. Side seams. Tear away label. *Due to the specialized washing process, each shirt is unique. " CLICK HERE for fit comparison with 6004 ".