Four ergonomically designed magnetic buckles help ensure an easy and secure attachment Four carry positions provide ergonomic positioning as your child grows, for healthy spine and hip development: newborn mode, facing in, facing out, back carry Integrated infant booster with covered locking zippers to ensure soft and safe use with babies under 4 months Head support can fold down or be removed as baby grows Magne Tech secure snap™ is a self-guiding magnetic buckle that automatically lock.