HALO SleepSack Wearable Blanket- Velboa The SleepSackTM wearable blanket replaces loose blankets for safer sleep. It's the wearable blanket that carries the "#1 Safe Sleep Product" gold seal from First Candle/SIDS Alliance. The SleepSackTM 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 SleepSackTM wearable blanket allows your baby to stay safe, warm and cozy all night long. This wonderful fabric has the deluxe hand and feel of the popular Velboa blankets, but has safety in mind. We've lined the cozy velboa with a light, soft jersey knit. Satin binding in the arms, neck and down the front zipper give it a royal look.