Size Large: 6-9 months 18-21lbs 100% Cotton Swaddle Transition Product: Baby Merlin's Magic Sleepsuit is designed for babies to help transition from swaddling while promoting healthy sleep habits critical for development Soft Design: The merlin sleep suit is made with a soft jersey cotton outer and inner layer, with a polyfil layer in between for breathable comfort; also available in cozy microfleece for extra warmth Easy Diaper Changes: The merlins magic sleepsuit features a double zipper design for quick and easy diaper changes; machine washable for easy care, making life simpler for parents with little ones Promotes Better Sleep: This sleep sack 6-9 months helps babies develop independent sleep habits after swaddling, providing the right amount of warmth and comfort for longer, uninterrupted sleep