Adjustable width for the newborn baby as well as for the bigger baby Adjustable seat height allows the carrier to gradually grow with the baby For use with babies weighing 8–30 lb (3.5–13.5 kg) Adjustable head support cradles the newborn's head and folds down for baby to face forward Bamboo fabric top cover removes for easy cleaning Ventilated lumbar support minimizes strain on your lower back A unique, built-in back support in the front piece keeps baby's developing spine straight Wide padded harness straps and a lumbar support provide ideal weight distribution Ergonomically designed buckles are user friendly, making the M1 quick and easy to use