Made from an all-natural viscose bamboo blend, this fabric will keep baby cool yet comfortable at the same time -- yep, it’s temperature regulating! The silky-smooth fabric is soft, breathable and comfortable, making it the perfect choice for the most sensitive baby skin. SPECIFICATIONS 95% viscose from bamboo, 5% spandex Two-way YKK zippers Fold over mittens on newborn and 0-3 month sizing Foot grips on 3-6 month + sizing Ankle elastic keeps little feet in place Zipper garage at neckline keeps zipper from rubbing against baby’s neck Zipper lining prevents direct contact from zipper to baby’s tummy [no interfering with those fresh belly buttons] Tag-free neckline Machine wash cold, tumble dry low heat or hang to dry Preemie/Newborn sizing is the perfect "coming home" or "baby's first outfit" choice in any season! Welcome to the world, little ones! Pair it with a matching knot hat or bow for baby's coming home outfit.