3.7 oz., 65% polyester, 35% viscose; 30 singles; Athletic Heather is 52% polyester, 48% viscose; ; Marble colors are 3.5 oz., 91% poly, 9% combed ringspun cotton, 40 singles ; Stripe colors are 70% rayon, 30% polyester; Racerback with sheering at seam; Sideseamed; Merrowed bottom hem; easy, drapey fit; Tear-away label;