SKU: 98422748771
britax marathon booster conversion

britax marathon booster conversion Britax Grow With You Harness Booster Car Seat

Sale price$19.25 Regular price$21.39
Save 10%

Pay in installments of $5.35 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

britax marathon booster conversion 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: 98422748771

Discover Niche Categories That Outsell britax marathon booster conversion

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 29 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Andrea W.
Cuba, US
★★★★★ 4
A bit expensive for what it is
Sweatshirt as expected in quality and color. Minus 1 star for price. A bit too expensive, better value found at a mall.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
B
Verified Purchase
Betty R. Small
Houston, US
★★★★★ 5
High quality item
Size: 13 Years, Color: Light Blue
My granddaughter is 12 years old and loves these types of jackets for school, as the AC is cold. The color (baby blue, which was her personal request) was beautiful and the quality was excellent. The size 12 was a perfect fit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2025
K
Verified Purchase
Kelsey
Pawtucket, US
★★★★★ 3
Shrunk
Size: 9 Years, Color: Lavender
Shrunk after 2 washes- the sleeves are now too short for my daughter
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
A
Verified Purchase
Amy Walsh
Los Angeles, US
★★★★★ 5
Fits true to size
Size: 13 Years, Color: Light Blue
This hoodie fits true to size. It’s high quality, cozy inside and we love the blue color. I would consider it a great value for the price. We will be buying more colors for sure.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 29, 2025
S
Verified Purchase
stephanie miller
Grantham, US
★★★★★ 1
Sizing is not accurate!
Size: 9 Years, Color: Light Blue
I bought this for my granddaughter, who is 8 years old, and typically wears a size 8. I purchased the size 9, she likes oversized hoodies, even though the add already says it’s oversized. It was MAYyBE a size 6, it was tight on my six year old granddaughter. I sent it back, and am not reordering. I’m not going to keep guessing on sizing. I want to know that when I order the size she wears in Nike, Adidas, Target,etc. , that it’s going to be the same, and not have to keep returning items…
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 26, 2025

recommand products