5 oz., 100% combed ringspun cotton 1x1 rib; White is sewn with 100% cotton thread; Granite Heather is 60% combed ringspun cotton, 40% polyester; Heather is 60% combed ringspun cotton, 12% polyester 1x1 baby rib; Easytearâ„¢ label; CPSIA compliant tracking label on garment; Fit: infant unisex