Features: 4.2 oz., 100% combed and ringspun cotton; 30 singles- Ash is 99% combed and ringspun cotton, 1% polyester - Athletic Heather is 90% combed and ringspun cotton, 10% polyester - all other Heather colors are 52% combed and ringspun cotton, 48% polyester - Marble colors are 91% poly, 9% combed and ringspun cotton, 40 singles, 3.5 oz.; - Neon colors are 52% combed ringspun cotton, 48% polyester, 40 singles, 3.6 oz. - retail fit; fitted sleeves; sideseamed