SKU: 377304947
britax marathon insert

britax marathon insert Britax Poplar S Convertible Car Seat

Sale price$24.91 Regular price$27.68
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  • USA
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

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Description

britax marathon insert Britax Poplar S Convertible Car SeatThe Britax Poplar Convertible Car Seat can safely accommodate children up to 50 pounds while rear facing and easily transitions to a forward facing car seat as your child grows. Slim outside and spacious inside, the toddler car seat features 17" SpaceSaver technology designed to fit 3 across* without compromising on trusted Britax safety and premium comfort. *Britax cannot guarantee 3 across installation fitment in all vehicles. Specifications

The Britax Poplar Convertible Car Seat can safely accommodate children up to 50 pounds while rear-facing and easily transitions to a forward-facing car seat as your child grows. Slim outside and spacious inside, the toddler car seat features 17" SpaceSaver technology designed to fit 3-across* without compromising on trusted Britax safety and premium comfort.

*Britax cannot guarantee 3-across installation fitment in all vehicles.

 

Specifications
  • Convertible design car seat works as a rear-facing car seat with the infant insert, and converts to a forward-facing car seat.
  • 2 additional premium inserts and padding that help create refined comfort and a tailored fit. 
  • ReboundReduce™ Stability Bar is a carbon steel bar that easily attaches to the car seat when installed rear-facing. It minimizes the movement in the event of a crash; it must be removed when installed forward-facing 
  • With ClickTight, you know it’s right in just 3 easy steps: open, buckle, and close.
  • Infant inserts are specifically designed to fit newborns 22 lbs. and under.
  • 5-point safety harness helps evenly distribute crash energy to keep your child safe.
  • Fully open seat belt paths are clearly labeled and easy to access, while the automatic tensioner takes care of the tightening.
  • Patented v-shape top tether has two connection points to help slow and reduce forward movement in a crash; easily stores away when not in use.
  • The fabric is naturally flame retardant with no added FR chemicals
  • Safecell Technology acts as a crumple zone, helping to keep crash energy away from your child.
  • The 14-position harness and headrest move with one hand to grow with your child.
  • Washer and Dryer Friendly, no more hand washing or waiting for the cover to air-dry; just quick and easy cleanup, so you can keep moving.
  • The 2 cup holders slide in and out and are dishwasher-safe for easy cleaning between rides.
  • Easy-read level indicators with 6-position and quick-adjust recline help you find the most comfortable fit for your child and the best fit for your vehicle.
  • 1-Year Limited Warranty.

Dimensions & Weight

  • 17" W x 23.5" H x 20.5" D
  • Child Weight Rear-Facing: 5 - 50 lbs.
  • Child Weight Forward-Facing: 22-65 lbs.
  • Child Height: up to 49"
  • Seat Area Depth/Width: 11" / 12"

Britax strongly recommends that children ride rear-facing to the highest weight or height specified.

 

What's Included
  • Convertible Car Seat
  • 2 Removable Premium Inserts
  • 2 Dishwasher Safe Cup Holders.
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: 377304947

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David
Lowell, US
★★★★★ 5
Size dog recommendations
Color: Grey
Not recommended for big dogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
D
Verified Purchase
DarylFay
West Palm Beach, US
★★★★★ 2
Small in size
Color: Grey
Very small, picture makes it look much larger than it is. Seemed more appropriate for a cat, and 6 month puppy figured it out in under 1 min. Not very challenging.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
E
Verified Purchase
Extremely good quality. Soft ... SIZE UP if you want a looser fit. It is not "form fitting, or snug, but no extra. I am 5'5 190# 60 years old. This ... an XL will go to my daughter. I will be getting another 1-2 sizes up. We'll worth it!
Grantham, US
★★★★★ 5
Excellent for boredom and learning
Color: Blue
Wonderful! Daughters very intelligent Australian shepherd loves this. She takes it out when he's bored, or has t been able to give as much one on one. Well made
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Reviewed in the United States on May 26, 2026
M
Verified Purchase
Michelle M
Bozeman, US
★★★★★ 5
Durable and engaging!!!
Color: Blue Green Orange
This has been a game changer! My dog all of a sudden started gently chewing on a couple of my shoes while I was at work. I set this out right before I leave for work. My shoes have been safe ever since!!!
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Reviewed in the United States on June 11, 2026
K
Verified Purchase
Kyaire and Nelly
Lowell, US
★★★★★ 5
My dog LOVES this!
Color: Blue Green Orange
My dog LOVES this thing! It keeps her busy for a good 45 minutes if she gets distracted, we use it to hide her food because she swallows it whole when we feed her in a bowl. So this has slowed her eating wayyyy down and has helped immensely in keeping her occupied. The quality is nice, i love that it’s felt, BUT it seems like if she scratches at it enough, the strings of the fabric come out and feels fuzzy. I’m not sure how to describe it but it looks like it might experience some pretty bad ware and tear after a while. I love how easy it is to set up, and the variety of folds help the food get stuck so that my dog can sniff and dig her way around. Very nice toy set up!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 9, 2025

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