Give your child a comfy rear-facing ride...all the way up to 40 pounds! The Apt 40RF convertible car seat allows babies to remain in a safer rear-facing position up to 40 pounds and 40 inches in height. Tall toddler? The Apt moves into a forward-facing position for children up to 40 pounds and 43 inches in height. (Actual fit may vary. Not all children will comfortably fit in the seat for the full weight and height ranges listed).