The HALO SleepSack Wearable Blanket, Cotton goes over baby's regular pajamas and provides a safe and comfortable night's sleep. It has been named the First Candle/SIDS Alliance #1 Safe Sleep Product so parents can have peace of mind. This baby wearable blanket features a sack design to allow kick room as well as an inverted zipper for easier access and diaper changes. In addition to helping your baby sleep safer, the HALO SleepSack wearable blanket helps your baby sleep better, too. It is a warm cuddly blanket they cannot kick off; ensuring baby sleeps soundly throughout the night