The new Frontier 90 Combination Harness-2-Booster - Zebra by Britax boasts the revolutionary CLICKTIGHTa Installation System combined with BRITAX's leading head safety technologies. The Frontier 90 keeps your big kid safe and offers parents the peace of mind of a safe, secure, and easy car seat installation each and every time. CLICKTIGHTa Installation System is an innovative technology that allows parents to easily achieve a safe and secure installation using a vehicle seat belt every time. The Frontier 90 offers a forward-facing, five-point harnessed weight capacity up to 90 pounds with an industry-leading 20.5 inch shoulder harness height. It also converts into a vehicle belt-positioning booster seat that can be used up to 120 pounds. Comfort and convenience features include: a tangle-free, no-rethread five-point harness with an EZ-buckle system to retain the harness buckle in a forward position, a front-adjust recline, integrated cup holders and storage, multiple buckle positions, fixed armrests, comfort foam, and an easy-remove cover.