https://fromrebel.com/products/tranzitions-3-in-1-harness-booster-car-seat-proof-848c31 14867089752431 Tranzitions 3-in-1 Harness Booster Car Seat - Proof 99.99 https:files/2773bcf7-1572-42e3-bd22-11320e21af52_9cc59045-c56f-4897-8314-8cbece2683f8.webp https:files/2773bcf7-1572-42e3-bd22-11320e21af52_9cc59045-c56f-4897-8314-8cbece2683f8.webp USD OutOfStock Graco 639935873391 Baby & Kids 641800995183 Baby Best Sellers 630363128175 Best Sellers 291289268373 Big Babies 6-18 months 291287662741 Car Seats 636240265583 Daily Deal Drops 641725563247 Deals on Graco 291285696661 Gifts Under $100 302408237205 Gifts Under $150 302408269973 Gifts Under $350 312721539221 Graco 646287884655 Newness 644789829999 Non-DS 291282223253 Over $10 635358577007 Over $75 Warranty Products 291288187029 Ships Nationally 306996609173 Shop By Age 641453392239 Up to 60% OFF 291286712469 What's New 636239970671 What's New in Baby Gear & Kids The Graco Tranzitions 3-in-1 Harness Booster is designed to grow with your child and go with you, wherever your journeys take you—from car to carpool and beyond. This lightweight car seat transitions seamlessly from harness booster (26.5-65 lb) to highback booster (40-100 lb) to backless booster (40-100 lb) and features the Simply Safe Adjust Harness System, which adjusts your harness and headrest to 9 height positions, with no rethreading. It features two rotating cup holders to keep your child happy, a machine washable seat pad, and harness covers.Highlights 3-in-1 harness booster helps protect your child, from toddler to youth Grows with your child from forward-facing harness (26.5-65 lb) to highback booster (40-100 lb) to backless booster (40-100 lb) No-Rethread Simply Safe Adjust Harness System allows the headrest and harness to adjust together in one motion Lightweight, portable seat is ideal for busy, active parents One-hand, 9-position adjustable headrest grows with your child Integrated, rotating cup holders help keep your child's drink close Open-loop belt guides help properly position your vehicle’s seat belt 139.99 Graco ADDONPOP AutoList_v4 AutoPublish_v1 BABY BOOSTER SEATS CAR SEATS FRESHNESS FY2026.49 GRACO NEW ARRIVALS PERCENT_OFF_RANGE_0_30 PERCENT_OFF_RANGE_20_30 REBELBEST https:files/b76daad2-e1b8-4ebc-a376-59cb02e3121c_24f2c7ba-496f-4bf8-91a5-ecaccc432471.webp https:files/c621469c-fbb5-49c4-b176-b6efd812896c_0894bb9a-6dc9-4006-b991-16a9c4ae948c.webp https:files/9e163fde-c3b4-43dc-b517-c040eb8c4978_435e8358-2bef-4a97-a493-67deb72d6f4f.webp https:files/ecbd8e43-5fc6-4543-9ee6-6e9b19cfdca0.webp 52562973262191 Open Box 99.99 139.99 https: https://fromrebel.com/products/tranzitions-3-in-1-harness-booster-car-seat-proof-848c31?variant=52562973262191 OutOfStock Open Box 52562629034351 Imperfect 101.99 139.99 https: https://fromrebel.com/products/tranzitions-3-in-1-harness-booster-car-seat-proof-848c31?variant=52562629034351 OutOfStock Imperfect