650-fill-power down. Fill power measures the loft of the down and ranges from 450 to 1000 for apparel. Shell: 100% polyester. Lining: 100% nylon. Fill: 75% down 25% other feathers. Machine washable. Size 9 months has a 253⁄4" body length and a 16" sleeve length. Sleeve length is taken from the center back of the neck. Signature embroidered pony at the left chest. Hood. Zip front with a snapped storm placket.