Best Narrow High Back Booster

Graco Tranzitions 3-in-1 Harness Booster Seat, Toddler to Big Kid Car Seat from 10-45 kg (22-100lb), Harness/Highback/Backless Booster, Proof

Diono Radian 3R, 3-in-1 Convertible Car Seat, Rear & Forward Facing, 10 Years 1 Car Seat, Slim Design Fits 3 Across, Pink Blossom

Graco Turbobooster Highback Booster Seat, 2-in-1 Car Seat, Highback to Backless Booster, Kamryn

Britax Skyline 2-Stage Belt-Positioning Booster Car Seat, Dusk

Evenflo GoTime Sport High Back Booster (Telluride Black)

Chicco MyFit Harness + Booster Car Seat, 5-Point Harness and High Back Seat, For children 25-100 lbs. - Notte/Black & Grey

Evenflo 30712344C Chase Plus 2-In-1 Booster Car Seat (Huron)

Diono Monterey 5iST FixSafe High Back Booster Car Seat with Expandable Height And Width, Compact Fold To Full Size Booster, Foldable, Portable Booster For Go-Anywhere Travel, Gray Slate

Evenflo GoTime LX Booster Car Seat (Chardon Black)

Evenflo GoTime LX High Back Booster (Astro Blue)