Evenflo Chase DLX Booster Car Seat Another jewel in the crown of the Evenflo booster dynasty. The Chase DLX is another safe seat that combines comfort and safety. It has all of the relevant features required of a car seat. It includes an internal harness, seat belt positioner and Comfort Touch padded armrests. A key feature is the easy front harness adjustment. Parents can pull on the adjuster up front and the harness tightens to fit the child's needs.