95% Rayon derived from Bamboo, 5% Spandex Imported Certified Safe Sleep: As one of the newborn essentials must haves, our swaddles are CPCS certified, ensuring your baby's safety and comfort. The unique folding sleeves allow parents to open one or both sides for the baby to self-soothe, or close them to prevent the baby from scratching their face or skin, reducing startle reflex Ideal Transitional Swaddle: Perfect for babies who prefer arms-up sleeping or are starting to roll over. Loose hemline of the baby sleep sack aids in transitioning from tradition swaddles to baby sleeping bags, offering ample room for movement, promoting healthy hip joint development Premium Fabric Blend: Crafted with 95% rayon derived from Bamboo and 5% spandex, the surface offers unparalleled comfort, moisture-wicking, sustainability and friendly to baby's skin. The 100% polyester filling ensures warmth, making it adaptable for year-round use, regulating your baby's temperature Convenience for Parents: Featuring a two-way zipper, it's user-friendly for new parents. The bottom zipper allows easy diaper changes without disturbing your baby's sleep. Plus, the top zipper cover protects your little one's chin from potential scratches Tailored to Perfection: Designed considering the height, weight, and needs of American babies, referencing official WTO data. Our swaddle caters perfectly to infants aged 0-15 months, ensuring a snug and safe fit. Alsothe nice package makes it a perfect baby gifts new born