The newest car sear from Chicco is the MyFit, a convertible seat that turns into a booster. It accommodates children 25-65 lbs with the harness and 40 to 100 lbs without it.  

Features include a 9-position headrest, deep head and torso wings plus EPS foam for enhanced side-impact protection, a deep seat pan to comfortably support older children with longer legs and an ergonomically contoured seat.

You can pre-order the MyFit today and it will be in stores in January.