Size small. 12-18lbs. outer layer- 100% cotton, inner layer-100% cotton and fill-100% polyester Imported Swaddle Transition Product: Baby Merlin's Magic Sleepsuit is designed for babies aged three to six months; helps 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. 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 Comfortable Sleep: The Magic Merlin Sleepsuit 3-6 months encourages back sleeping in cribs; proper fit ensure comfort, giving parents peace of mind as their baby transitions from swaddling Promotes Better Sleep: This sleep sack 3-6 months helps babies develop independent sleep habits after swaddling, providing the right amount of warmth and comfort for longer, uninterrupted sleep