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Description
britax marathon convert to booster Britax Grow With You Harness Booster Car SeatGrow With You harness 2 booster car seat grows with your child from toddler to big kid. Its made with premium fabrics and padding for superior comfort and style. Installing the seat is simple using the premium, quick push LATCH connectors. 2 layers of side impact protection surround the head, neck & torso. Plus, SafeCell Technology in the base acts as a crumple zone to help absorb crash energy. Quickly adjust the 9 position harness & headrest using
Grow With You™ harness-2-booster car seat grows with your child from toddler to big kid. It’s made with premium fabrics and padding for superior comfort and style. Installing the seat is simple using the premium, quick-push LATCH connectors. 2 layers of side impact protection surround the head, neck & torso. Plus, SafeCell Technology in the base acts as a crumple zone to help absorb crash energy.
Quickly adjust the 9-position harness & headrest using just one hand for the proper fit as your child grows. Once they’re ready to use the seat belt, the 5-point harness tucks away, transitioning to a belt-positioning booster. Color-coded guides help you and your child route the seat belt through the right paths. With arm rests, cup holders and harness comfort pads, even big kids enjoy the ride.
Features:
- Harness mode 25lbs - 65 lbs; Booster mode 40 lbs -120 lbs.
- Stylish, soft-knit fabrics look great in your backseat.
- SafeCell Technology acts as a crumple zone, helping to absorb crash energy.
- Industrial strength steel frame reinforces the seat structure to help keep it stabilized.
- V-shaped tether with staged-release stitches helps slow and reduce forward movement during a crash.
- 2 Layers of Side Impact Protection: Energy-absorbing shell and foam-lined headrest protect your child’s head, neck, and torso.
- Premium, quick-push LATCH connectors for simple, secure installation.
- 9-position, quick-adjust harness & headrest move together using one hand for the proper fit as your child grows.
- 2-position buckle can be moved outward to accommodate your growing child.
- 2 recline positions help you find the most comfortable fit for your child and the best fit for your vehicle.
- 4 cup and snack holders keep drinks, snacks, and toys within reach.
- Harness comfort pads keep your child’s neck from rubbing against the harness strap.
- Nap-friendly padding & fabrics for superior comfort and a quiet ride.
- Color-coded belt guides make it easy for you and your child to route the seat belt through the right paths.
- Easy-to-remove cover for cleaning without uninstalling the car seat or removing the harness.
- Flip-forward buckle stays out of the way for easy boarding.
- Easy-to-clean arm rests help your child ride comfortably.
- Proudly designed, tested and built in the USA with US and global components for safety and quality.
Specifications:
- Product Dimensions: 21" L x 19" W x 25" H
- Car Seat Weight: 23 lbs
- Child Weight Capacity:
- Harness mode 25–65 lbs
- Booster mode 40–120 lbs
- Child Height Capacity: Up to 63"
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Superb debut!
Format: Kindle
Wow! I loved this book so much! I've been a pro tennis fan since I was a little kid, so I put this book on my TBR the moment I saw it. However, had I known about the supernatural soulmate/soulmark element (first time I've ever heard of that trope) I would have moved it to the top of the pile IMMEDIATELY. Now I can't wait to read more, both in that trope and from this author. A great debut, and I can't wait to read future books from this writer!
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Reviewed in the United States on October 3, 2025
★★★★★ 4
magical realism + sports romance
Format: Paperback
3.75★
sapphic challengers with some ashley poston-esque magical realism!
this was a fun twist on the soulmate concept, making them real possibilities for the lucky few born with the name of their marking their wrist. for luca, it's everything she's dreamed of. for juliette, it would only get in the way of her tennis dreams.
luca and juliette face off as tennis rivals who also happen to be soulmates. juliette deals w the pressure of being 3rd in a whole family of tennis aficionados while luca deals w her legendary plays as merely "luck".
if you really like tennis or the sports aspect of sports romance, this definitely gets into the thick of it. sometimes it was confusing for me as someone who doesn't really know tennis well, but generally, i enjoyed it.
The romance was really cute, I did find Juliette a little bit bratty in the beginning (probably deliberate) but there's definitely growth with their relationship.
Overall, it was an enjoyable sports romance with a little ✨
an honest arc review ♡
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Reviewed in the United States on October 11, 2025
★★★★★ 3
Decent fluffy beach read
Format: Paperback
As a lifelong tennis fan and a queer woman, I was excited to find this book. However, the writing and characterization were not the best and I found the language used to describe the sex scenes pretty distasteful (like something you'd find in a hetero romance novel, I imagine). Nevertheless, I finished the book and it was still a decent fluffy beach read.
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Reviewed in the United States on January 11, 2026
★★★★★ 5
Loved it
Format: Kindle
This book was a Rollercoaster of emotions and I was all about it. I love the relationship between Luca and Juliette bc it was real and human. It showed growth, love, and understanding. It wasn't easy but it was real. I enjoyed every moment of it especially the soul marks. That was a wonderful element to the plot that I would love to read more of.
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Reviewed in the United States on September 19, 2025
★★★★★ 4
So cute
Format: Paperback
Ok, going into this, I didn't realize this had any fantasy-ish/magical elements, so for a minute, that threw me off. But honestly, I was really pleasantly surprised by this book. I had never heard of Katie Chandler before, but had seen the book mentioned on a list of upcoming releases so I just thought I would give it a try. This is a classic rivals to lovers story and I was here for it! Luca and Juliette were pretty nasty to each other in the beginning so it definitely took a minute for them to come around. I really enjoyed the amount of character growth that happened in this story. Juliette especially comes a long way within herself to be a better person her Luca and for herself. It was definitely a bit of a rollercoaster with the push and pull, but it paid off in the end. The idea of a "fated mates" situation, in a mostly contemporary romance was definitely original and I look forward to seeing how she might incorporate those fantasy elements into future books. 4 stars from me! Great story.
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Reviewed in the United States on August 9, 2025