5 oz., 100% combed ringspun certified organic cotton. 1x1 baby rib. Flatlock seams. Double-needle ribbed binding on neck, shoulders, sleeves and leg openings. Reinforced three-snap closure. Colors are dyed with environmentally friendly dyes. (Natural and White are sewn with 100% cotton thread.) Sizes other than those listed may be available; please call for details and pricing.