5 oz. 100% combed ringspun cotton 1x1 baby rib; White is sewn with 100% cotton thread; Heather is 88/12 combed ringspun cotton/polyester 1x1 baby rib; Ribbed flatlock stitched cuffs; Easytear™ label; Flatlock sideseam construction; Cpsia compliant hang tag swift tacked to garment