Calming Down the Moro (startle) Reflex, Enjoy Sleep - We know that you feel very tired when you hardly have a good night's sleep as the newborn baby is easily awakened, or crying at night, or needs to be carried around constantly to sleep, etc. This snug fit sack creates a familiar safe and secure feeling just like in mommy's womb, and it also mimics held by you. This ensure babies are comfortable throughout their sleep cycles and enjoy sleep. Suitable for various sleeping positions of babies. Lifesaver for Transitioning out of Swaddles! -- Once baby is showing early interest in rolling over, starting with one/two arms out, or kid doesn t like their arms being restricted in the swaddle, it s time to ease the transition. It helps your little one adjust to sleep without a swaddle by providing just the right amount of snugness.