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  • Britax Marathon 70 Convertible Car Seat, Onyx
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Britax Marathon 70 Convertible Car Seat, Onyx


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Onyx
  • Safe cell technology features safe cells designed to compress in a crash, significantly lowering the center of gravity and counteracting the forward rotation of the child seat which normally propels the child toward the front seat, Integrated steel bars strengthen the connection to the vehicle and reduce forward flexing of the child seat during a crash, Energy-absorbing versa-tether features a staged-release tether webbing to slow the forward movement, reducing the crash forces reaching the child, and a two-point attachment to minimize forward rotation while anchoring the top of the child seat, Side impact protection comprised of deep side walls lined with energy-absorbing EPP foam distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body, Tangle-free; Five-point harness distributes crash forces across the strongest parts of the body and provides a secure fit
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Product Information

Color: Onyx
Technical Details
Item Weight18 pounds
Product Dimensions21 x 18.5 x 26 inches
UPC652182070588
Item model numberE9BB11A
Minimum weight recommendation5 Pounds
Maximum weight recommendation70 Pounds
Batteries requiredNo
  
Additional Information
ASINB005UBCHEG
Best Sellers Rank #24,319 in Baby (See top 100)
Shipping Weight22.4 pounds
ShippingCurrently, item can be shipped only within the U.S.
  
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Product Description

Color: Onyx

The Britax Marathon 70 convertible car seat is designed for children rear facing from 5 to 40 pounds and forward facing from 1 year and 20 lbs up to 70 pounds. The Marathon 70 achieves revolutionary head safety through the use of Britax SafeCell Technology, integrated steel bars, and versa-tether that work together to minimize head excursion and reduce the risk of head injury during a frontal impact. The Marathon 70 also incorporates Britax side impact protection, offers a no-rethread and quick-adjust five-point harness, multiple buckle and recline adjustments, and an easy access cover and access to belt paths from the front of the seat. A head and body pillow is provided for comfort.


Customer Questions & Answers

Customer Reviews

It seems very safe and secure and comfortable.
S.Tibs
Not only is stylish, the safety feature are amazing and by far the best quality car seat I've looked at.
Elena
Straps are very easy to adjust and height of back adjusts.
Michael Dandridge

Most Helpful Customer Reviews

82 of 85 people found the following review helpful By JT on December 16, 2011
Color Name: Cowmooflage Verified Purchase
This thing is the rolls royce of carseats. I seriously regret not getting a Britax for my first child. I thought "How can it be so much better?" In every way its better! It is thick, substantial padding, awesome convenient features. I have a giant 21 lb. 6 month old baby. I searched for a rear-facing car seat with a good recline and I got it. He reclines very comfortably in this. The latch and tether on this are very solid. It also has a feature that makes changing the harness height literally a snap. It takes a second and it is secure. I will never go back to less expensive brands. I have a reputation for being frugal and this is something that is worth the price!
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95 of 100 people found the following review helpful By Ed Mind on June 3, 2012
Color Name: Onyx
We bought this car seat because our baby outgrew his infant car seat. We installed it rear-facing and placed our baby in it and was absolutely shocked by how little leg space there is. My 17 month old baby is in the 60th percentile for length/height, so he is not too tall and his legs are no unusual length, but his knees have to bend at least 45 degrees because they hit the seat of our car and his legs look very uncomfortably scrunched up when we place him in the seat. There is no way we can have him ride in this car seat like that! I guess that all the positive reviews is for the safety aspect of the seat, or the front-facing use, or maybe some paid reviewers, because I cannot imagine any child being comfortable in this seat rear-facing unless they are still very small or have REALLY short legs. This seat would probably be fine forward facing, since it is room in the seat part and well cushioned but PLEASE test out the chair in your car with your child in it before buying. We tested the seat at the store to make sure it fit in our car, but we didn't think of testing the child in it too, big mistake! We are returning this seat ASAP.

NOTE: I just read that the Britax Marathon 70 was rated #1 in having the most toxic chemicals, so consider this before buying.

UPDATE: Upon further research, I've found that most convertible carseats in the rear-facing position offer little leg space for toddlers and that it is "normal" for kids' legs to bend or rest on top of the back of the seat in which the carseat is on. Rear-facing is still safest for kids under 40 lbs. However, some carseats do offer more leg space than others. We are continuing or search for the right one....
Read more ›
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83 of 87 people found the following review helpful By -- on December 13, 2011
Color Name: Onyx Verified Purchase
I just had this car seat installed RF in my VW GTI and it fits perfectly fine with room for someone to sit in the front seat. I had looked all over the internet for this info but could not find it so I was concerned I would have to return the seat for lack of space. Pleasantly surprised I didn't have to!. Also, I had it professionally installed but I was there as it was done and it looked like a breeze (RF with the latch system).
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72 of 81 people found the following review helpful By Melissa Kitchen on January 16, 2012
Color Name: Onyx
I seen there were 2 One Star reviews. I also went into research mode.
According to the HealthStuff.com site, YES, this car seat is considered HIGH on the Toxicity Chart.

And no, I'm not concerned.
[...]

It states that there is a large measure of Bromine in the clips on this safety seat.
I looked up what that is used for, and why it's such a big deal.
You know what I found? Bromine is used as a Flame Retardant. You see the importance?

Think about being in an accident, the car in raging hot with flames. You are scared for your child's life, not sure if you can get him/her out quickly.
Then you take into consideration, there is Bromine on the clips so they DON'T MELT in the extreme heat.
Therefor, you un-clip and free your child easily and are away from the vehicle in an instant!

See what I did there? I don't wish that on ANYONE... But doesn't it make sense?
Besides, how many of you see your children chewing on something and getting poisoned by something that's resistant to extreme heat like fire?

This is a worth while seat for the price, and ease of mind.
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51 of 58 people found the following review helpful By mamaB on November 16, 2011
Color Name: Cowmooflage Verified Purchase
First of all, watch the video. That should be the main reason why you buy this seat. My husband was very hesitant on spending over 200 dollars on a car seat but once we looked at them in the store and did our research this was the best we could get for our family so we made the purchase. I ordered the seat late Sunday night and it was at my door Weds. morning.....almost unbelievable (I live in NC). It came in the Britax box and was ready to be put in the car once I adjusted everything to my 11 month olds comfort. It is so well made and the latches were another selling point for us. Unlike the Graco and other brands all you do is press a button and pop it on the latch, no pinching and doing crazy wrist movements, pinching fingers, getting AGRAVATED anymore for us!!!! We bought the cow print and couldn't be happier with it (we have two girls but are planning on adding two more children to the family). If you are looking for a car seat that meets your safety needs to a T, A+++++ this car seat is for you. It is one of the bulkier car seats but my children's safety is #1 to me. I know it is an investment and we look forward to many years with our Britax!!! We are awaiting the arrival of the Parkway Britax for our older daughter, we are so excited!!!
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