Brand New! 3-6 Months This baby sleepwear is designed to help your little one when breaking out of the swaddle but still seeking the safe and comfortable feeling that the swaddle provides. The Magic Sleepsuit provides that cozy feeling while allowing your infant the freedom of movement they need as they develop. Proper fit and timing of introduction of the Sleepsuit are critical to the safe and effective use of Baby Merlin's Magic Sleepsuit. Please refer to the sizing chart for the Sleepsuit. It is designed for back sleeping in the crib in accordance with the ABCs of safe sleep: babies are Alone on their Back and in a bare Crib. It should be used at the AAP recommended temperature for babies, which is on the cooler side. The Magic Sleepsuit helps establish good sleep habits and provides parents peace of mind that their baby is getting adequate rest for proper growth and development. Discontinue use of the Magic Sleepsuit when baby shows signs of rolling over while wearing the Sleepsuit.