Graco Affix Highback Booster Seat Manual
Lost your manual? Not sure how to install the booster or when to remove the back?
Don’t stress. This page has everything you need to confidently use and install your Graco Affix Highback Booster Seat.
Scroll down to download the official PDF manual or read our quick setup tips. Whether you’re installing it with LATCH or switching to backless we’ve got your back!
Download the Graco Affix Highback Booster Manual (PDF)
Product Overview
The Graco Affix Highback Booster is designed for older kids who are ready to move on from a harnessed seat but still need extra support. It works as a high-back belt-positioning booster and easily converts to a backless booster when your child is ready.
It’s simple to install, super lightweight, and equipped with LATCH to keep the booster securely in place even when not in use.
Key Features at a Glance
- 2-in-1 Booster Seat: High-back + Backless modes
- Weight Range: 40–100 lbs
- Height Range: 40–57 inches
- One-Hand LATCH System: Keeps seat secured to the vehicle
- Fully Adjustable Headrest
- EPS Energy-Absorbing Foam
- Open-Loop Belt Guides: Help position seat belt correctly
- Integrated Cup Holder + Storage Compartment
- Removable, Machine-Washable Seat Pad
- Meets or Exceeds All US Safety Standards
- Not FAA Approved (boosters are not allowed on airplanes)
Quick Tips from Parents
- Use the LATCH system to keep the seat from sliding around when the child gets in or out
- Adjust the headrest so the shoulder belt sits properly across the shoulder not the neck
- Only use this seat when your child can sit upright without slouching for the entire ride
- Transition to backless only when your child no longer needs the side and head support
- Regularly clean out the hidden snack drawer it gets messy fast!
Frequently Asked Questions – Graco Affix Booster Manual
1. What are the height and weight limits?
- High-Back Mode: 40–100 lbs, 40–57 inches
- Backless Mode: Same limits, but child should have sufficient neck and back support from vehicle seat
2. Can I use this seat on an airplane?
No. Booster seats are not FAA approved because they require a lap-and-shoulder belt, which airplanes don’t have.
3. Is the LATCH system required?
No. LATCH is optional and is only used to secure the empty seat. The child must always use the vehicle’s seatbelt.
4. When should I switch to backless mode?
Switch when your child is big enough to sit correctly without the support of a backrest and headrest. This is usually when they’re closer to 100 lbs or 57 inches.
5. How do I clean the seat pad?
Remove the cover and machine wash on gentle cycle with cold water. Air dry only no bleach or heat drying.
Need more help?
Still unsure about something? Drop your questions below whether it’s about belt positioning, switching to backless mode, or proper installation. We’re here to help!