Safe, Sound Sleep: Everybody Sleeps Better with HALO® The unique HALO SleepSack wearable blanket replaces loose blankets that can cover your baby's face and interfere with breathing. Made only with 100% premium, non-toxic, lead and chemical free fabric; it's the #1 choice of hospitals and parents. The HALO SleepSack is a warm, cuddly blanket that babies can't kick off, ensuring baby sleeps soundly through the night. Therefore, in addition to sleeping safer, it helps babies sleep better too, thus promoting healthy physical, mental, and emotional development. When baby sleeps better, you sleep better. Everybody sleeps better with HALO ®.