5.0 oz., 100% combed ringspun cotton 1x1 baby rib ; Heather is 88/12 combed ringspun cotton/polyester; White is sewn with 100% cotton thread; Flatlock stitched seams, side seam construction; Double needle ribbed binding on lap shoulder neck, shoulders, sleeves and leg opening; Innovative three snap closure; Snap Tape Technology that keeps kids safe and secure; EasyTear label; CPSIA Compliant tracking label in side seam