New Arrivals Britax Close Outs Peg Perego Aria Overstock Toys
Britax Marathon Convertible Car Seat Onyx
 
 Marathon Convertible Car Seat Onyx
 Marathon Convertible Car Seat Onyx
 Marathon Convertible Car Seat Onyx
 Marathon Convertible Car Seat Onyx
 Marathon Convertible Car Seat Onyx
 Marathon Convertible Car Seat Onyx
   
Free Shipping On  Marathon Convertible Car Seat Onyx
 Marathon Convertible Car Seat Onyx Demo
Britax Event
No Tax + Free Shipping
$279.99
Seen This Product For Less?
or call toll free (866) 616-1155
Recommended:
Add This Product
Your Price: $37.99
$49.95
Add This Product
Your Price: $19.99
$29.99
  • Convertible, rear facing 5 to 35 pounds and forward facing from at least one year old and 20 pounds up to 65 pounds
  • Higher weight limit convertible allows children to remain harnessed up to 65 pounds
  • Tangle-free, five-point harness with four harness heights for a snug and secure fit
  • Premium push-button LATCH connectors ensure a quick, simple and tight installation
  • Patented Versa-Tether energy managing top tether, anchors top of seat to the vehicle, reducing movement in the event of impact. Allows for rear facing tethering for seat stabilization
  • Rear- and forward-facing recline for child comfort and positioning
  • EPS protective foam liner manages energy
  • High density comfort foam gently cushions the child
  • Patented HUGS, Harness Ultra Guard System, reduces forward head movement and gently cushions the neck and chest
  • Lift-lever front harness adjustment allows for a consistently snug harness fit
  • Built-in lock-offs tightly secure the vehicle seat belt
  • Convenient belt holders, keep harness to the side while placing child in the car seat
  • Plush, washable cover with matching comfort and belly pads
  • Contoured base for a perfect fit in most vehicles

Britax is serious about safety. Britax child car seats are designed to the support the recommendation of the American Academy of Pediatrics, which recommends that children ride in the rear facing position for at least one year of age and a minimum of 20 pounds to reduce the risk of serious neck and spinal cord injury. 

Britax was established in 1939 and they currently have 10 facilities worldwide.  And with a crash test facility on site, all cars seats are rigorously tested and perfected before you precious cargo sits in it.

The Britax Marathon begins with the shell, an exclusively engineered resin that creates a rigid barrier to protect your child’s head and chest with its deep side walls and provides side impact protection. The seat was designed to hold infants in the rear facing position from 5 to 35 pounds and toddlers up to 65 pounds forward facing.

Layered over the shell is the EPS foam, an energy absorbing padding that is designed to transfer energy away from your child in the event of a car accident.  The EPS foam is used in three locations, head and shoulders to absorb energy and reduce head and torso injury; and in two locations on the seat.

In addition, all convertible and forward facing Britax car seats feature Versa-tether, a patented tether system that is designed to enhance the performance of the car seat by anchoring it to the vehicle. A second benefit to the Versa-Tether is that it helps indicate when the car seat has been involved in a moderate or severe crash.  In the event that the car seat needs to be replaced following an accident, the red seam on the Versa-Tether will be torn and looked “webbed.”

The built in vehicle belt lock-offs for installation with the vehicles safety belt is another superior safety feature you will find on all Britax convertible car seats. Combined with LATCH system connectors with a push-button release, these features will ensure the most secure possible installation in your vehicle. 

Britax cars seats feature side impact protection since 2002, a time when there was no safety standards implemented for side impacts.  So Britax pioneered the way and “cherry picked” standards from around the world to make the Britax marathon the safest.  Now, thanks to Britax, the deep side walls first featured on Britax car seats are becoming commonplace on all cars seats.

The “HUGS” straps, or Harness Ultra Guard System, are attached to the 5 point harness straps by the chest and are feature raised vertical rubber pieces to grip to your child’s clothe and reduce forward movement in the event of an accident.  Now that the seats are safe, the Marathon has some features for baby’s comfort, such as the comfort foam making the Marathon a fully-lined seat, plus four adjustable shoulder harness positions for a growing baby;   as well as features for mom’s convenience as well, notably the velco belt holders that keep the harness tangle free. In addition, the seat fabrics are removable and washable.Some additional information to keep in mind:

•Britax Marathon can be used forward facing in the reclined position up to 33 pounds maximum weight.  At that time discontinue use of recline.•When seat is used rear facing harness straps should be positioned at or just below child’s shoulders.•For forward facing straps should be at or just above child’s shoulders.•Discontinue use of your Britax car seat after 6 years from the date of manufacture (for the Britax Marathon the date of manufacture can be found on the top right (or child’s left) section of the frame where the seat fabric ends).•If you have installed your Marathon using Latch, discontinue use with Latch and reinstall using the vehicle safety belt for children weighing more than 48 pounds. Unless otherwise specified by the vehicle manufacturer, assume a 48 pound child is the vehicle LATCH anchor limit.•To ensure that child is securely fastened with harness straps, if you can “pinch” strap in a loop, pull straps tighter.•Wash seat fabric by hand to ensure that the flame retardant coatings safety is not compromised.



Love this carseat

About Me: Kelli
Product Rating:
I recommend this product
What do you like most about this product? Great seat, beautiful color

Comment:


What a great product! I have a Marathon for my 3-year-old son, so of course I had to get one for my daughter, who just turned one.



Happy Grandma

About Me: Jill, grandma
Product Rating:
I recommend this product

Comment:


I am a grandma driving my first-ever new car. I bought this car seat to stay in my car. I studied lots of reviews and feel confident I made the best choice for my convenience, baby's safety, and baby's comfort. I also enjoyed being able to find a seat cover that coordinated with my car's interior.

I was concerned that it would be too big for my Camry, and it is a little tight if others are in the back seat too. However,I definitely recommend this seat to anyone.



Great car seat

About Me: Bre Banlow
Product Rating:
I recommend this product

Comment:


Britax car seats are wonderful and this one lives up to expectations. I picked the Marathon because it lasts so long, though not so long that my child will be in middle school when they outgrow it. Great car seat!



Love the Carseat Love Happy Mothers

About Me: Margaret
Product Rating:
I recommend this product

Comment:


Happy Mothers has amazing customer service! They took care of a problem (totally my fault) in a flash and made it so easy. Couldn't ask for more. The order arrived super fast too.

This carseat is great and can be used rear facing for a long time which is the safest way.



BEST CAR SEAT

About Me: evan
Product Rating:
I recommend this product

Comment:


best car seat out there



I feel safe with my son in this car seat

About Me: Stefanie
Product Rating:
I recommend this product
What do you like most about this product? safety
What do you like least about this product? slightly difficult to install but once it is in it doesn't move!

Comment:


although the seat is labeled down to 5 lbs, if you are buying it for a small infant, I would try them in it before you purchase. My son is 20 lbs and is appropriately secured with the straps in their "smallest" positions.



I adore these carseats!

About Me: maria, Twin mommy from Boston
Product Rating:
I recommend this product
What do you like most about this product? Safety & Comfort

Comment:


I had originally ordered 2 of these carseats for my twins from Amazon, but although they claimed to have a few in stock, they only had 1. They claimed that they'd ship the second carseat within a few weeks, but after a few emails delaying even further, I realized that i needed to cancel their order.



I discovered Happymothers.com through a google search, and tehy were efficient and wonderful. I couldn't be more pleased.



My twins love riding in their ultra-safe seats!



Great Car Seat

About Me: Jayme
Product Rating:
I recommend this product
What do you like most about this product? Safe, Easy to Use
What do you like least about this product? Nothing

Comment:


I love this car seat, my son seems very comfortable in it, it was easy to set up and I feel that it is very safe!



Great Car Seat!!!

About Me: Leyla
Product Rating:
I recommend this product
What do you like most about this product? Safety

Comment:


Our daughter loves this car seat. She could not sit in any other seat.



Super Safe Seat, Great Deal at Happy Mothers!

About Me: Darcy, First-time Mom, trying to be eco-conscious from Pittsburgh, PA
Product Rating:
I recommend this product
What do you like most about this product? Safety; ability to rear-face up to 35 lbs.
What do you like least about this product? Cover is a pain to remove; would like organic covers

Comment:


I did a lot of research before deciding on the carseat that my daughter would use after outgrowing her infant seat. I read lots of opinions from Moms who'd been there and what they'd bought and used, as well as from carseat installation experts. Safety and the rear-facing limit were the most important factors to me. That's why I chose the Britax Marathon, and I have not been disappointed. I chose the Denim cover because I wanted one that was removable and I hate that poly-plush that most of the covers are.

The only downside is that the cover is difficult to remove. Ideally I wish that a chemical-free cover were available, but nobody has that to my knowledge. Also of course it is pricey, but for the length of time that we expect to use it, I thought it was worth it. That and you can't put a price on your child's safety. Please look into extended rear-facing if you plan on turning your child at 1 year and 20 lbs!