Summer Infant By Your Side Sleeper Bassinet provides a comfortable environment for co-sleeping with baby. 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. For babies 0- 3 months or until baby rolls over. Includes mattress. Folds compactly for travel, with storage pocket for diapers or pacifiers.