4.2 oz., 100% combed and ringspun cotton; 30 singles; Ash is 99/1 combed ringspun cotton/poly; Athletic Heather is 90/10 combed ringspun cotton/poly; all other Heather colors are 52% combed and ringspun cotton, 48% polyester; Triblends - 50% poly, 25% combed ringspun cotton, 25% rayon, 40 singles, 3.8 oz.; retail fit; sideseamed; ribbed cuffs;