The HALO™ SleepSack™ wearable blanket replaces loose blankets for safer sleep. It is endorsed by First Candle/SIDS Alliance. The SleepSack™ wearable blanket reduces the risk of rebreathing (the inhalation of carbon dioxide), which has been associated as a possible cause of sudden infant death syndrome. The SleepSack™ wearable blanket allows your baby to stay safe, warm and cozy all night long.