Are you providing the safest sleep environment for your baby? Is your baby cold at night? If you are worried about your baby's sleeping then the Halo Sleepsack wearable blanket is your answer. It's a warm cuddly blanket they can't kick off; ensuring baby sleeps soundly throughout the night. The Halo SleepSack wearable blanket also replaces loose blankets in the crib that can cover your baby's face and interfere with breathing. In addition to sleeping safer, it helps babies sleep better, too. Features: -Replaces loose blankets for safe sleep. -Recognized as “Hip Healthy” by the International Hip Dysplasia Institute. -Inverted zipper for easy diaper changes. -Machine wash with like colors. -100% Cotton | TOG 0.5 Small: Birth to 6 months, 23 to 26 in, 10 to 18 lbs Medium: 6 to 12 months, 26 to 30 in, 16 to 24 lbs Large: 12 to 18 months, 30 to 35 in, 22 to 28 lbs X-Large: 18 to 24 months, 35 to 40 in, 26 to 36 lbs