For sale I have a used Britax Frontier 85 Combination Booster Car Seat, Rushmore. Manufactured on 3/25/2010. Do Not Use after 3/25/2019.

About the product
Highest 5 point harness seat capacity allows your child to remain harnessed up to 85 pounds or in booster mode to 120 pounds
True side impact protection distributes crash forces, shields from vehicle intrusion, contains the head and body and keeps the head, neck and spine "in true" or aligned, to limit injury
Patented versa-tether introduces a staged-release tether webbing that anchors the top of the child seat at two points to minimize forward movement in a crash
Quick-adjust head restraint and no-rethread harness easily adjust the harness shoulder height and head restraint without disassembling the harness

Thanks for looking!