Crafted from a luxurious blend of 92% viscose from bamboo and 8% spandex, this sleep bag offers the perfect balance of softness and stretch. Bamboo viscose is naturally breathable and temperature-regulating, keeping little ones comfortable through the night. The added spandex ensures a gentle, flexible fit that moves with your child as they sleep. Ideal for sensitive skin, this fabric is hypoallergenic and incredibly gentle against delicate skin.