SKU: 77173134101
britax marathon insert

britax marathon insert Britax Poplar Convertible Car Seat (Cobalt Onyx)

Sale price$22.28 Regular price$24.75
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Ships within 48 hours · Estimated delivery Nov 3 - Nov 8

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Description

britax marathon insert Britax Poplar Convertible Car Seat (Cobalt Onyx)This item is an open box model and includes full manufacturer warranty. Purchase online for store pickup, we cannot ship these If you need to come in and test this model out as well as others in our showroom, be sure to book a consultation through our website. Ready to go with room to grow! The Britax Poplar Convertible Car Seat takes the stress out of moving to the next car seat stage thanks to the patented ClickTight Installation and slim SpaceSaver

This item is an open box model and includes full manufacturer warranty.

Purchase online for store pickup, we cannot ship these

If you need to come in and test this model out as well as others in our showroom, be sure to book a consultation through our website.

Ready to go with room to grow! The Britax Poplar Convertible Car Seat takes the stress out of moving to the next car seat stage thanks to the patented ClickTight® Installation and slim SpaceSaver™ design. This car seat accommodates up to 50 pounds rear facing to help keep your child riding safely even longer and easily switches to a forward facing car seat as your child grows. ClickTight Technology installation provides fully open seat belt paths that are clearly labeled and easy to access, and the automatic tensioner takes care of the tightening. 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. The Britax car seat boasts a patented SafeCell® crumple zone and V-shaped top tether to help manage crash energy. The reinforced frame and belt paths provide strength and stability. Rear facing car seat cover fabrics are naturally flame retardant with no added FR chemicals and safe to machine wash and dry. *Britax cannot guarantee 3-across installation fitment in all vehicles

  • CONVERTIBLE DESIGN: Works as a rear facing car seat with the infant insert, rear facing and converts to a forward facing car seat
  • CLICKTIGHT INSTALLATION: With ClickTight, you know it’s right in just 3 easy steps: open, buckle and close 
  • INFANT INSERT: Specifically designed to fit newborns 22 lbs and under 
  • 5-POINT SAFETY HARNESS: Helps evenly distribute crash energy to keep your child safe
  • CONVENIENT BUCKLE: Fully open seat belt paths are clearly labeled and easy to access, while the automatic tensioner takes care of the tightening
  • PATENTED V-SHAPED TOP TETHER: Has 2 connection points to help slow and reduce forward movement in a crash; easily stores away when not in use
  • FLAME RETARDANT: 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 
  • ADJUSTABLE HARNESS: The 14-position harness and headrest move with one hand to grow with your child 
  • 5-POINT SAFETY HARNESS: Helps evenly distribute crash energy to keep your child safe
  • 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
  • DISHWASHER-SAFE CUP HOLDERS: The 2 cup holders slide in-and-out for easy cleaning between rides
  • EASY-READ LEVEL INDICATORS: The 6-position and quick-adjust recline help you find the most comfortable fit for your child and the best fit for your vehicle

Specifications

  • Product Dimensions: 20.5"L x 17"W x 23.5"H
  • Harness Slot Heights: 8", 8.7", 9.4", 10.1", 10.8", 11.5", 12.2", 12.9", 13.6", 14.3", 15", 15.7", 16.4", 17"
  • Buckle Strap Depths: 4" - 7"
  • Child Weight: 5-65 lbs
  • Rear-facing Harnessed Height: Less than 49"
  • Forward-facing Harnessed Height: Less than 49"
  • Rear-facing Harnessed Weight: 5-50 lbs
  • Forward-facing Harnessed Weight: 30-65 lbs
  • Seat Area Depth/Width: 11" / 12"
  • Shoulder Width: 14"
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: 77173134101

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Maxisss
Waukegan, US
★★★★★ 5
Good quality shelves
Color: Walnut, Size: 24in, Color: Walnut, Size: 24in
These shelves are gorgeous in person. Yes, they're darker than the listing pics, but I actually prefer it. The grain is beautiful, they came well-packed, and mounting them was no trouble at all. Now I've got display space that feels both stylish and practical. Definitely worth it!
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Reviewed in the United States on February 9, 2026
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Laoneil1004@gmail
Lowell, US
★★★★★ 5
AWESOME
Color: Rustic Brwon, Size: 16in
EASY INSTALL, I WILL BUY MANY MORE
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Reviewed in the United States on May 7, 2026
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Louis G
Los Angeles, US
★★★★★ 5
Easy to install, very tough!
Color: White, Size: 16in, Color: White, Size: 16in
Seriously, scoring these shelf stands for $30 feels like an absolute steal! Four chunky wood boards with metal T-brackets that actually feel substantial - way sturdier than those flimsy IKEA ones I used to have. My old cheapo stands warped after half a year, but these hold up like a champ - I've got like 15 heavy textbooks stacked on them right now. Love the little details too: rounded edges so you won't scrape your hands, and rubber grip strips on the bottom. They look legit fancy in my living room as bookshelves and even class up my kitchen herb garden. My friend thought they were some high-end designer furniture! Honestly, the craftsmanship at this price puts my old $60 wooden shelves to shame. Already told my DIY group chat about these - trust me, you can't go wrong!
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Reviewed in the United States on March 13, 2025
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Chad Collins
Carnegie, US
★★★★★ 4
Great look. Sturdy.
Color: Rustic Brwon, Size: 16in
Great look if you can get it installed. The sticker paper mounting guides rip so easy so he careful!
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Reviewed in the United States on October 4, 2025
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Lisa Bulkilvish
Natrona Heights, US
★★★★★ 1
Worst item ever
Color: White, Size: 16in
Set up shelves and not sturdy at all. Followed the instructions perfectly. Very poorly made. I don’t have the box and now I’m stuck with the item. Garbage can here it comes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026

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