Usable from newborn to 3 years old without any accessories, and the size can be adjusted to accommodate growth. It allows for four carrying positions, including front-facing carry, and is ergonomically designed. You can use it for newborn carry, hip carry, forward-facing carry, and back carry, adapting to the situation. It's designed to allow the baby to maintain a natural spread-squat position, preventing unnatural postures, and features a waist belt and thick shoulder pads to reduce the burden on the mother. The waist belt, in particular, is a significant factor in reducing stress on the lower back. 【Product Details】 ・Thick shoulder straps that can be crossed ・Waist belt to support the hips ・Head & neck support to support the neck and head ・Sleeping hood for neck support and sun protection Material: Baby carrier body: 100% cotton Size: Target age: Newborn to 36 months Weight capacity: Approximately 3-20kg Sizes are approximate.