5.0 oz., 100% combed ringspun cotton 1x1 baby rib. Heather is 88/12 combed ringspun cotton/polyester. Feature include flatlock stitched seams, double needle ribbed binding on lap shoulder neck, shoulders, sleeves and leg opening, snap tape technology that keeps kids safe and secure, innovative three-snap closure, side seam construction, easy tear label. CPSIA compliant tracking label in side seam.