SKU: 54855294878
britax marathon booster

britax marathon booster Britax Grow With You Harness Booster Car Seat

Sale price$24.43 Regular price$27.14
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 28 - Sep 2

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For Your Every Summer RSVP, with Code: SUMMER15

Description

britax marathon 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:
  1. 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
SKU: 54855294878

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4.2 ★★★★★
Based on 25 reviews
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Tara Peterson
Boise, US
★★★★★ 5
Perfect Every Day shoe for School!
Size: 12 Little Kid, Color: Black/Multi, Size: 12 Little Kid, Color: Black/Multi
My 5 year old daughter (6 next month!) picked these out for back to school. She started Kindergarten and she really liked these. They’re super adorable! Love the black since they’ll match pretty much any outfit. The rainbow is super vibrant and the fabric of the shoe is very soft. She says they’re very comfortable as well. She’s growing into a 12, so that’s what we went with and it’s perfect bc she had a little bit of room at the toe. They’re easy for her to put on and they’re very lightweight. The perfect every day shoe. She’s been wearing them to school for about a week and so far they still look brand new (that’s the pic I took from today.) Definitely recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 9, 2025
C
Verified Purchase
Courtney rene
Phoenix, US
★★★★★ 5
Great shoe for Littles
Size: 13 Little Kid, Color: Black/Multi
These were super comfortable for my 7 year old. They've held up and endured the play grounds and school days. Washed up easily, the color made that possible. These were super lightweight and didn't rub her heel when she walked.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
M
Verified Purchase
MsJ2323
Lexington, US
★★★★★ 5
awesome cute shoes
Size: 13.5 Little Kid, Color: Black/Multi
My 7 year old loves them and says they are very comfortable. lightweight. and slip on is perfect not loose or too tight.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 10, 2025
T
Verified Purchase
Two Bacon Bits
Phoenix, US
★★★★★ 5
No cramps!
Size: 5 Big Kid, Color: Black/Multi
Perfect fit! Vibrant colors! Not to heavy! Easy to put on and take off!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 25, 2025
S
Verified Purchase
SpicyPumpkin90
Charlottesville, US
★★★★★ 5
Kid likes them, all that matters
Size: 1 Little Kid, Color: Black/Multi
Kiddo is happy. She says they're comfortable and fit well. Also loves the color. I like how they're versatile and will go with the majority of her clothing. Sketchers always makes good shoes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026

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