The SleepSack® wearable blanket replaces loose blankets in the crib that can cover baby's face and interfere with breathing. In addition to helping baby sleep safer, the SleepSack® wearable blanket helps baby sleep better, too. It is a warm cuddly blanket they cannot kick off; ensuring baby sleeps soundly throughout the night. Use over regular sleepwear to take the place of loose blankets. Inverted zipper for easy diaper changes. 100% cotton. Large size fits 22-28 lbs. Machine wash with like colors.