Excellent condition. 12-18 lbs. (Approximately 3-6 M) You may use it all the way to 10 months. Our babygirl is 10 months and only 17 lbs. The Magic Sleepsuit is 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.