How does the SNOO work?

You start by swaddling your baby in one of three included SNOO Sleep Sacks (small, medium or large) made of organic cotton and breathable mesh to allow for airflow. The clip-in wings prevent risky rolling in the bassinet and keep your newborn on their back all night — the best way to reduce the risk of SIDS, according to the American Academy of Pediatrics.

Then, the magic happens: The bed rocks your baby and plays white noise to help with falling asleep and staying asleep — just like a baby would naturally experience in the womb. If your baby starts crying, the bassinet knows to speed up the motion and increase the soothing sounds to help even the fussiest babies relax. If that's not impressive enough, Happiest Baby claims the SNOO can calm most babies in under a minute.

There's also a built-in app that lets you customize your baby's settings. You can change the starting levels to be faster and louder, and the sensitivity to be more or less responsive to your baby’s cries. The app also tracks sleep so you can see the total amount your baby gets each day, the longest stretch per night and weekly and monthly patterns like how much your baby sleeps during the day vs. night.