2.5 TOG, for extra warmth Outer & Lining: 100% GOTS certified organic cotton, Filling: 100% polyester Concealed zipper for safety 0-6 months (10-18 lbs, 23-26 in), 6-18 months (16-28 lbs, 26-35 in), 18-36 months (25-36 lbs, 35-40 in)