4.2 oz.(US) 7 oz. (CA), 52/48 Airlume combed and ringspun cotton/polyester, 32 singlesAthletic Heather & Black Heather are 90/10 airlume combed and ringspun cotton/polyester Heather Prism colors are 99/1 airlume combed and ringspun cotton/ polyester (Unique coloring, grey flecks of heather pulled through the base color)Retail fitUnisex sizingCoverstitched collar and sleevesShoulder-to-shoulder tapingSide seamsTear-away label"CLICK HERE for fabric guide & screen printing tips"..