







The Britax Grow With You is designed to grow alongside your child, offering two stages of protection. It starts as a forward-facing harnessed car seat and later converts into a belt-positioning booster for children up to 120 lbs. Here are the key features:
- Harness Mode Weight Range: 25-65 lbs
- Booster Mode Weight Range: 40-120 lbs
- Comfort: Built-in armrests and two layers of side impact protection ensure comfort and safety.
- Safety Features: The Grow With You has SafeCell technology in the base that helps absorb crash energy and reduce head movement.
- Ease of Use: While it’s not equipped with ClickTight, the seat features an easy-to-adjust 9-position harness and headrest.
- Design: The seat is relatively lightweight and easy to install but may require more manual effort compared to ClickTight models.
The Britax Grow With You is designed to grow alongside your child, offering two stages of protection. It starts as a forward-facing harnessed car seat and later converts into a belt-positioning booster for children up to 120 lbs. Here are the key features:
- Harness Mode Weight Range: 25-65 lbs
- Booster Mode Weight Range: 40-120 lbs
- Comfort: Built-in armrests and two layers of side impact protection ensure comfort and safety.
- Safety Features: The Grow With You has SafeCell technology in the base that helps absorb crash energy and reduce head movement.
- Ease of Use: While it’s not equipped with ClickTight, the seat features an easy-to-adjust 9-position harness and headrest.
- Design: The seat is relatively lightweight and easy to install but may require more manual effort compared to ClickTight models.




Next up, the Britax Grow With You ClickTight builds on the original Grow With You but adds the ClickTight installation system for an easier, foolproof install every time. Here’s what makes it stand out:
- ClickTight Technology: The standout feature of this model is Britax’s ClickTight system, which ensures a secure and simple seatbelt installation without the need for extra tools or complicated procedures. Just open the front of the seat, thread the belt, and click it closed.
- Safety and Comfort: The seat includes the same 2 layers of side impact protection and SafeCell technology found in the original model, offering exceptional safety standards.
- Harness and Booster Mode: Just like the Grow With You, this model supports a forward-facing harness (25-65 lbs) and converts into a belt-positioning booster (40-120 lbs).
- Adjustability: The 9-position harness and headrest can be easily adjusted as your child grows.
- Ease of Use: The ClickTight system makes installation quick and hassle-free, even for parents who find car seat installation challenging.
Next up, the Britax Grow With You ClickTight builds on the original Grow With You but adds the ClickTight installation system for an easier, foolproof install every time. Here’s what makes it stand out:
- ClickTight Technology: The standout feature of this model is Britax’s ClickTight system, which ensures a secure and simple seatbelt installation without the need for extra tools or complicated procedures. Just open the front of the seat, thread the belt, and click it closed.
- Safety and Comfort: The seat includes the same 2 layers of side impact protection and SafeCell technology found in the original model, offering exceptional safety standards.
- Harness and Booster Mode: Just like the Grow With You, this model supports a forward-facing harness (25-65 lbs) and converts into a belt-positioning booster (40-120 lbs).
- Adjustability: The 9-position harness and headrest can be easily adjusted as your child grows.
- Ease of Use: The ClickTight system makes installation quick and hassle-free, even for parents who find car seat installation challenging.




For those looking for extra safety features, the Britax Grow With You ClickTight Plus offers premium upgrades. Here’s what you get with this high-end model:
- Reinforced Frame: The Grow With You ClickTight Plus comes with an upgraded steel-reinforced frame for even more durability and crash protection.
- V-Shaped Tether: This feature helps reduce forward movement in the event of a crash, improving overall safety.
- Comfort and Safety: This model also features the highest levels of side-impact protection with 3 layers instead of 2, ensuring superior safety for your child.
- Easy Installation: Like the ClickTight, the ClickTight Plus includes the easy-to-use installation system that parents love, making it simple to install with confidence.
- Harness and Booster: Same as the other models, this seat grows with your child from harnessed mode (25-65 lbs) to booster mode (40-120 lbs).
- Luxury Features: The ClickTight Plus offers more plush fabrics and additional comfort padding compared to the standard models, making long trips more comfortable for your child.
For those looking for extra safety features, the Britax Grow With You ClickTight Plus offers premium upgrades. Here’s what you get with this high-end model:
- Reinforced Frame: The Grow With You ClickTight Plus comes with an upgraded steel-reinforced frame for even more durability and crash protection.
- V-Shaped Tether: This feature helps reduce forward movement in the event of a crash, improving overall safety.
- Comfort and Safety: This model also features the highest levels of side-impact protection with 3 layers instead of 2, ensuring superior safety for your child.
- Easy Installation: Like the ClickTight, the ClickTight Plus includes the easy-to-use installation system that parents love, making it simple to install with confidence.
- Harness and Booster: Same as the other models, this seat grows with your child from harnessed mode (25-65 lbs) to booster mode (40-120 lbs).
- Luxury Features: The ClickTight Plus offers more plush fabrics and additional comfort padding compared to the standard models, making long trips more comfortable for your child.




The Nuna ROYL is a premium harness-to-booster seat that combines luxury and safety in one sleek design. Offering high-end features, the ROYL stands out with its innovative safety elements, eco-friendly materials, and ease of use. Key Features:
- Forward-facing harness: 25-65 lbs
- Booster mode: 40-120 lbs
- Aeroflex™ side-impact protection: Lightweight but strong to absorb and diffuse energy
- Steel-reinforced frame: Enhances durability and crash protection
- GREENGUARD Gold Certification: Ensures no harmful chemicals or pollutants
- Customizable recline: Allows for optimal comfort in both harnessed and booster modes
- Washable covers: Easy to remove and clean
The Nuna ROYL is a premium harness-to-booster seat that combines luxury and safety in one sleek design. Offering high-end features, the ROYL stands out with its innovative safety elements, eco-friendly materials, and ease of use. Key Features:
- Forward-facing harness: 25-65 lbs
- Booster mode: 40-120 lbs
- Aeroflex™ side-impact protection: Lightweight but strong to absorb and diffuse energy
- Steel-reinforced frame: Enhances durability and crash protection
- GREENGUARD Gold Certification: Ensures no harmful chemicals or pollutants
- Customizable recline: Allows for optimal comfort in both harnessed and booster modes
- Washable covers: Easy to remove and clean
Key Differences at a Glance:
Feature | Britax Grow With You | Britax Grow With You Clicktight | Britax Grow With You Clicktight Plus | Nuna Royl |
---|---|---|---|---|
Installation System | Manual | ClickTight | ClickTight + Steel Frame | True Tension Doors |
Weight Range (Harness Mode) | 25-65 lbs | 25-65 lbs | 25-65 lbs | 30-65 lbs |
Weight Range (Booster Mode) | 40-120 lbs | 40-120 lbs | 40-120 lbs | 40-120lbs |
Safety Features | SafeCell tech, 2 layers of side protection | SafeCell tech, 2 layers of side protection | SafeCell tech, 3 layers of side protection, steel frame | Aeroflex foam, reinforced steel |
Ease of Installation | Moderate | Easy (ClickTight) | Easy (ClickTight) | Easy (True Tension Doors) |
Comfort and Padding | Basic | Basic | Extra plush, luxury fabrics | Premium, ultra-comfortable fabrics |
Key Differences at a Glance:
Feature | Britax Grow With You | Britax Grow With You Clicktight | Britax Grow With You Clicktight Plus | Nuna Royl |
---|---|---|---|---|
Installation System | Manual | ClickTight | ClickTight + Steel Frame | True Tension Doors |
Weight Range (Harness Mode) | 25-65 lbs | 25-65 lbs | 25-65 lbs | 30-65 lbs |
Weight Range (Booster Mode) | 40-120 lbs | 40-120 lbs | 40-120 lbs | 40-120lbs |
Safety Features | SafeCell tech, 2 layers of side protection | SafeCell tech, 2 layers of side protection | SafeCell tech, 3 layers of side protection, steel frame | Aeroflex foam, reinforced steel |
Ease of Installation | Moderate | Easy (ClickTight) | Easy (ClickTight) | Easy (True Tension Doors) |
Comfort and Padding | Basic | Basic | Extra plush, luxury fabrics | Premium, ultra-comfortable fabrics |
At West Coast Kids, we understand that choosing the right harness-to-booster seat is a significant decision. Each of these models offers exceptional safety and comfort, but the right one depends on your family’s specific needs. Whether you're prioritizing ease of installation, safety, or comfort, there's a seat that fits every lifestyle.
Shop Best Harness-to-Booster Seats
At West Coast Kids, we understand that choosing the right harness-to-booster seat is a significant decision. Each of these models offers exceptional safety and comfort, but the right one depends on your family’s specific needs. Whether you're prioritizing ease of installation, safety, or comfort, there's a seat that fits every lifestyle.