【High-Grade Velvet Fabric】- Baby backpack carrier is made of high-grade velvet fabric. It is comfortable, breathable, skin-friendly, durable and suitable for all seasons. Protects baby's delicate skin from harm and brings baby the most gentle care. 【Suitable for Babies Weighing 7-35 lbs】- The baby sling carrier is suitable for newborns up to two years old (3.2kg/7lbs – 15.9kg/35lbs). Waistline Recommendation (with Clothes) for Carrier: up to 54 inches. 【Ergonomic Natural "M" Shape Design】- The bottom of the baby carrier can be adjusted to the size of your child's hips by adjusting the Velcro, catering to your child's growth at every stage for 7-35lbs. Achieve a safe fit and Ergonomic natural "M" position, regardless of your baby's size that ensures baby's healthy hip and spinal development. 【X-shaped Back Design】- Unlike conventional H-shaped carriers, the Baby Carrier employs a revolutionary X-shaped back design. This forward-looking feature distributes weight better and evenly for unrivaled comfort for both you and your little one. 【Foldable Neck Support Pad】- Provides ample support for baby's cervical spine,ensuring peaceful and comfortable sleep for your little one.