Side seamed;Retail fit.100% combed and ring spun cotton; 30 single 4.2oz.Athletic Heather is 90% combed and ring spun cotton 10% polyester.Dark Grey Heather is 52% combed and ring spun cotton 48% polyester.Blue Marble; Charcoal Marble; Navy Marble; Red Marble and White Marble are 91% polyester 9% combed and ring spun cottonComparable to American Apparel 2456Sizes: S; M; L; XL; 2XL.