3-in-1 Harness Booster Car Seat

2026-03-11T11:13:20-05:00

Type: Booster Car Seat
Price: 179.99

Give your child the perfect balance of comfort, safety, and convenience with the Safety 1st 3-in-1 Harness Booster Car Seat. Designed to grow with your child, this versatile seat easily transitions from a forward-facing harness to a high-back booster and then to a backless booster, offering long-lasting value and protection. The 10-position adjustable headrest ensures a secure and comfortable fit at every stage, while red-to-green indicators confirm that the headrest is properly locked in place for added peace of mind.

Parents love the convenient harness storage system that tucks neatly into the seat shell when using the high-back booster mode, making transitions simple and clutter-free. The slim design allows the seat to fit 3 across in the back seat of most vehicles, a lifesaver for families with multiple children or carpooling needs. Despite its secure build, this booster is lightweight and portable, making it easy to move between vehicles without hassle.

Independent buckling is easier than ever thanks to the easy-to-use belt guides, which help position the seat belt correctly while giving older kids confidence to buckle up on their own. The design promotes proper seat belt use in booster mode by raising your child to the correct height for safe belt positioning, ensuring protection on every trip.

Practical extras parents appreciate include two integrated cup holders, perfect for drinks and snacks and a backless booster shoulder belt guide for consistent, proper fit. Cleanup is stress-free with surfaces and cup holders that are easy to wipe down. Most importantly, the Safety 1st 3-in-1 Harness Booster meets or exceeds all Canadian regulatory standards (CMVSS 213 and 213.2) and complies with FMVSS No. 213a Side Impact Standard, so parents can trust it to deliver the highest level of certified safety.

From long road trips to everyday school runs, the Safety 1st 3-in-1 Harness Booster Car Seat provides trusted safety, comfort, and convenience without sacrificing space in your back seat.