The MOBY 2-in-1 Carrier + Hip Seat is easy to use and allows you to easily position baby in the most optimal and ergonomic position for their hips and spine with very little adjustments. This carrier can be used from 4+ months, but it really shines when your baby is in the up and down part of their lives. They want to explore but frequently return to their parents for a quick cuddle. Because this carrier can be used on the front, hip, and back, this is the perfect complement or "next step" to your MOBY Wrap.