Summer Rest Assured Sleeper provides a cozy and comfortable environment for co-sleeping with baby. Designed to put your baby's comfort and safety first, a sturdy metal frame prevents you from rolling over on top of your baby during sleep. Mesh sides promote air circulation to help prevent your baby from overheating and allow you to easily see your sleeping baby. Soothing melodies and sounds and 2-speed vibration calm baby and help encourage peaceful sleep.