Crafted from a luxurious blend of 95% viscose from bamboo and 5% spandex, this sleep bag offers the perfect balance of softness and stretch. Bamboo viscose is naturally breathable and temperature-regulating, keeping your little one comfortable through the night. The added spandex provides gentle flexibility for easy movement and durability through countless washes. Ideal for babies who need a cozy, skin-friendly layer that moves with them.