5.0 oz., 100% combed ringspun cotton 1×1 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; Rabbit Skins style is being discontinued for a fabric upgrade to style 4421RS in fine jersey, offering more vibrant colors and easier DTG printing;