The Nanit Breathing Wear Sleeping Bag in size medium is designed for babies aged 3-6 months. The lilac color adds a cute and stylish touch to the nursery bedding. This sleeping bag helps to keep your little one warm and snug during nap time, while the breathable material ensures a comfortable environment for your baby to rest. Perfect for transitioning from swaddles and blankets, this sleeping bag is a safe and convenient choice for your baby's sleep routine.