Worn only once & washed in hypoallergenic, non scented detergent. Adorable and so sweet for a new baby girl. The size is newborn to 3 months. the cozy sleeper gown + hat set is a wardrobe staple for newborns who require constant diaper changes (aka all of them). with magnets down the front, baby stays in the gown during the diaper switcheroo: separate magnets, put on a freshy, click magnets, done. other amazing features: eco-friendly TENCEL™ modal fabric and built-in mitten cuffs.