5 oz., 100% combed ringspun cotton ; White is sewn with 100% cotton thread; 1x1 baby rib, flatlock stitched seams; Double-needled ribbed binding on lap shoulder neck, collar shoulders and leg opening; Double-layered flutter sleeves with serged edges; Coverstitched armholes and side seams; Innovative three snap closure; CPSIA compliant tracking label in sideseam; Easytear� label