Pure organic cotton keeps your baby comfy and safe while sleeping. The HALO(R) SleepSack(R) replaces loose blankets in the crib and is worn over regular sleepwear. Available in Small and Medium. Small fits newborns 0-6 months, 10-18 pounds, 23-26". Medium fits babies 6-12 months, 16-24 pounds, 26-30". Pure organic cotton interlock. Inverted zipper for easy diaper changes. Sleeveless design reduces risk of overheating. Personalization is available for an additional $7.00. Machine wash. Imported.