NEWBORN TO TODDLER: Adapts to your growing baby from ~0-48 months (7-45lbs), no extra infant insert needed for your newborn. MULTI- POSITION CARRIER: Wear on the front, back or hip, as baby grows. COMFORT: Exceptional lower back comfort with padded lumbar support waistbelt & extra padded shoulder straps with the option to wear 2 ways: crossed or "backpack style". Waistbelt can be worn high or low to maximize comfort, especially post C-section. CUSTOM FIT: Fits multiple wearers from petite to larger body types (waistbelt adjusts 26-52", shoulder straps 28-48") & easy to reach buckles to make adjustments. ERGONOMIC AS BABY GROWS: Acknowledged as hip healthy by the International Hip Dysplasia Institute. Adjustable bucket seat supports baby in an ergonomic natural "M" position in all carry positions.