Two stages, one seat: what the Chase Plus actually does
The Evenflo Chase Plus 2-in-1 Booster Car Seat is designed to grow with your child through two distinct modes. In the first stage, it works as a 5-point harness booster for children weighing 30 to 40 lb. In the second stage, it converts to a high-back booster that uses your vehicle's seat belt for children up to 100 lb.
That conversion is the heart of the seat's design, and getting the setup right at each stage matters more than any single feature. The Chase Plus includes RightFit belt path technology in the headrest, which auto-adjusts the vehicle belt to the correct height to help ensure a proper fit. The seat also has dual integrated cup holders, a padded seat that is removable and machine-washable, and a lower anchor and tether system for installation. It is available in Huron Black and Geneva Pink.
Chase Plus at a glance
- Chase Plus 2-In-1 Booster Car Seat: Converts from a 5-point harness booster for use 30–40 lb to a high-back booster with vehicle seat belt for use up to 100 lb. Defines the two modes and the weight ranges that determine when to switch.

Chase Plus 2-In-1 Booster Car Seat - Chase Plus 2-In-1 Booster Car Seat: RightFit exclusive belt path technology in the headrest auto-adjusts the vehicle belt to the correct height. Supports proper belt positioning in high-back booster mode without manual rerouting.
- Chase Plus 2-In-1 Booster Car Seat: Lightweight with a lower anchor and tether system for easy installation and transfer between vehicles. Useful for families who move the seat between cars regularly.
Setting up the Chase Plus in harness mode (30–40 lb)
- Confirm your child's weight: The 5-point harness booster mode is intended for children weighing 30 to 40 lb. If your child is outside that range, the seat is not in the correct configuration for them.
- Install with the lower anchor and tether system: The Chase Plus is equipped with a lower anchor and tether system for installation. Follow the seat's installation instructions for your vehicle; if you need help, Evenflo's ParentLink Consumer Care Team offers live video support with a certified car seat safety technician.
- Check the harness fit: With the 5-point harness, the harness should fit snugly against your child. The supplied information does not include harness-height adjustment steps, so consult the seat's manual or ParentLink support for specific guidance.
When and how to switch to high-back booster mode
The Chase Plus converts to a high-back booster that uses your vehicle's seat belt for children up to 100 lb. The switch point is determined by your child's weight and the seat's stated limits: once your child exceeds the 40 lb harness limit, the high-back booster mode with the vehicle seat belt is the appropriate configuration.
In high-back booster mode, the RightFit belt path technology in the headrest auto-adjusts the vehicle belt to the correct height. This is designed to help the belt sit properly across your child's shoulder and lap. The seat's lower anchor and tether system is used for installation, and the lightweight design makes it easier to transfer between vehicles when needed.
Fit checks that matter in both modes
- Weight range: Harness mode: 30–40 lb. High-back booster mode: up to 100 lb. Stay within the stated range for each mode.
- Belt positioning: In booster mode, RightFit auto-adjusts the vehicle belt height. Check that the belt sits correctly after installation.
- Installation security: Use the lower anchor and tether system as described in the seat's instructions. A secure install is the foundation for any fit check.
- Cup holders and padding: Dual integrated cup holders keep snacks and drinks close. The padded seat is removable and machine-washable for easy cleaning.
Cleaning and care between stages
The Chase Plus has a padded seat that is removable and machine-washable. That makes it practical to clean up spills or crumbs without dismantling the whole seat. The supplied information does not include specific washing temperature or drying instructions, so check the seat's care label before washing.
Evenflo states that the Chase Plus meets or exceeds all applicable federal safety standards and has undergone structural integrity, rollover, and temperature testing in addition to federally required testing. If you need help with installation or fit, the ParentLink Consumer Care Team offers real-time online help and live video support with a certified car seat safety technician.

