The HALO SleepSack wearable blanket replaces loose blankets in the crib for a safer night's sleep. Reduces the risk of rebreathing (inhalation of carbon dioxide), a suspected cause of SIDS, and suffocation. Keeps baby warm and covered all night long. Wear over regular pajamas. Inverted zipper for easy diaper changing. Adorable side appliqué with color block yoke. "Back is best" message reminds caregivers to put baby on their back to sleep. The HALO SleepSack is recommended by leading SIDS an.