Baby Merlin’s magic sleepsuit yellow — new — small 3-6 months 12-18 pounds My daughter wore it once, in perfect condition! Sleep sack with zippers The Magic Sleepsuit is our patented swaddle transition product created by a pediatric physical therapist and mother of four. It 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 baby the freedom of movement they need as they develop.