100% combed ringspun cotton, Heather is 90/10 combed ringspun cotton/polyester, CVC colors 60/40 combed ringspun cotton/polyester, White is sewn with 100% cotton thread, 1x1 baby rib, Flatlock stitched seams, Double-needle stitched ribbed binding on neck, shoulders, sleeves and leg openings, Innovative three-snap closure.