Evenflo Right Fit Booster Car Seat The Evenflo booster car seat is safe, comfortable, and priced right at under $20.00. It's a great choice for a second seat for a grandparent's or babysitter's car as it is compact and easy to transport. This no-nonsense booster car seat can accommodate a child weighing up to 80 pounds. The shoulder belt positioner works on either side of the seat. The Evenflo Right Fit Booster Seat features a washable seat pad, another great feature.