The HALO SleepSack wearable blanket replaces loose blankets in the crib that can cover your baby’s face and interfere with breathing. In addition to helping your baby sleep safer, the HALO® created the first SleepSack® over 20 years ago with both safety and comfort in mind. The #1 choice of 1,700 hospitals in the United States, our original wearable blanket with sleeveless design nestles baby like a soft blanket without the risk of Sleep-related dangers.