The baby deedee sleep nest is a baby sleeping bag that keeps infants and toddlers warm and cozy while sleeping. Sleeping bags for babies, also called baby sleep sacks or baby wearable blankets, replace loose blankets in the crib and help babies stay warm throughout the night. They are intended to be worn over regular sleepwear. With no blankets to be kicked off, the baby deedee sleep nest helps ensure you and your baby get a restful night"s sleep.