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Britax Marathon 70-G3 - Onyx

The Marathon 70-G3 achieves revolutionary head safety through the use of Britax SafeCell Technology in the base, integrated steel bars, and energy absorbing Versa-Tether that work together to minimize head excursion and reduce the risk of head injury during a frontal impact. The Marathon 70-G3 also incorporates Britax Side Impact Protection, offers a no-rethread and quick-adjust five-point harness, multiple buckle and recline adjustments, and an easy-remove cover that also allows access to belt paths from the front of the seat. A head and body pillow is provided for extra comfort and infant positioning.

Features:

  • Base with SafeCell Technology 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 forward movement
  • 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
  • Harness Ultra Guard System (HUGS) provides resistance to forward movement in the event of a crash
  • Plush, easy-remove cover with matching comfort pads and infant body pillow
  • Infant Positioning Insert may be necessary for small infants to achieve a snug fit (sold separately)
  • No-rethread, 5-point harness repositions the harness shoulder height without disassembling straps
  • Premium Lower LATCH Connectors for a quick and simple installation featuring a push button for easy release
  • Certified for Aircraft Travel

Manufacturer Recommended Weight/Height Limits:

  • Rear facing:From 5 to 40 pounds
  • Forward facing: From 20 to 70 pounds
  • Height:Up to 49 inches

Product Dimensions:

  • Weight:19.5 pounds
  • Depth/Width/Height:21 x 18.5 x 26 inches

• Made in the USA and Imported- Made in the USA and Imported
• 100% Polyester

Product Notes

Popularity: #7 in Car Seats
View All Britax Marathon G3

Britax Marathon 70-G3 - Chili Pepper

849 reviews
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List Price: $289.99
$214.99
Description
Price
   
Britax Marathon 70-G3 - Chili Pepper
$214.99 $289.99
Discontinued by vendor
Britax Marathon 70-G3 - Azalea
$289.99
Discontinued by vendor
Britax Marathon 70-G3 - Cowmooflage
$195.99 $289.99
Discontinued by vendor
Britax Marathon 70-G3 - Onyx
$238.09 $289.99
Discontinued by vendor
Britax Marathon 70-G3 - Waverly
$199.99 $289.99
Discontinued by vendor
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REVIEW SNAPSHOT®

by PowerReviews
BritaxMarathon 70-G3 - Chili Pepper
 
4.5

(based on 12 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Comfortable (10)
  • Durable (10)
  • Easy to adjust (9)
  • Safe (9)
  • Stylish (8)

Cons

  • Heavy (6)

Best Uses

  • Infants (10)
  • Toddler (9)
  • Newborn (3)
    • Reviewer Profile:
    • First time parent (7), Parent of two or more children (5)

Reviewed by 12 customers

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Displaying reviews 1-12

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4.0

great!!

By jjf

from quad cities, IL

About Me Parent of Two or More Children

Verified Buyer

Pros

  • Our Daughter Loves This S

Cons

    Best Uses

      Comments about Marathon 70-G3 - Chili Pepper:

      This seat is great. Easy to take apart and wash, comfort for the little one, easy to install.

      Comment on this review

       
      5.0

      Great product at good price

      By J

      from Bay city , MI

      About Me First Time Parent

      Verified Buyer

      Pros

      • Attractive Design
      • Comfortable
      • Sturdy

      Cons

      • Heavy

      Best Uses

      • Infants
      • Toddlers

      Comments about Marathon 70-G3 - Chili Pepper:

      Very comfortable and sturdy.

      Comment on this review

       
      4.0

      Sturdy but huge

      By Working Mother of One

      from Omaha NE

      About Me First Time Parent

      Verified Buyer

      Pros

      • Attractive Design
      • Comfortable
      • Easy to Assemble
      • Sturdy

      Cons

      • Heavy

      Best Uses

      • Infants
      • Newborn
      • Toddlers

      Comments about Marathon 70-G3 - Chili Pepper:

      All of my mom friends rave about anything Britax. Most of them have the G3 Marathon or another carseat by Britax. I have to agree with them that I think it's one of the best carseats in the market. However, be aware, that this carseat is huge. I have a Subaru Forester and it takes up quite a bit of space. It's hard to get the straps tightened when my child is in the car. With that being said,I would still buy it again. Its safety features are unbeatable.

      Comment on this review

       
      4.0

      Glad I went went with Britax!

      By Teacher Mom

      from Albertville, AL

      About Me Parent of Two or More Children

      Verified Buyer

      Pros

      • Comfortable
      • Easy to Adjust
      • Easy to install
      • Safe
      • Sturdy
      • Stylish

      Cons

        Best Uses

        • Infants
        • Toddlers

        Comments about Marathon 70-G3 - Chili Pepper:

        My ten month old had outgrown his Snugride 35 seat. We had always used Graco in the past with my oldest, too, but after some of the reviews and looking at the actual seats, we really liked the Britax. I received the seat very quickly and it was SO easy to install. We have to change it out from one car to another,as we haven't bought a second seat yet; it was VERY easy to do this. A little heavy, but not really any more than my baby! He hasn't really cried in the seat like he was doing in the other one. It's a snap to get him buckled. It is harder to get him in: I have to lift him up a little higher, but I think he really likes it. I am going to see about getting a second Britax soon for the other car!

        Comment on this review

         
        5.0

        " I would buy this product again and aga

        By Lisa G.

        from Pelham, NY

        About Me Parent of Two or More Children

        See all my reviews

        Verified Buyer

        Pros

        • Comfortable
        • Easy to Adjust
        • Easy to Clean
        • Easy to install
        • Safe
        • Sturdy
        • Stylish

        Cons

          Best Uses

          • Infants
          • Toddlers

          Comments about Marathon 70-G3 - Chili Pepper:

          This is my third Britax purchase and i love it. I have 2 toddlers and we travel in the car alot. I have 2 in my car and 1 for my husband's car. The seats fit great in my Nissan Altima, one on both sides. we found it easy to install and was able to adjust the straps for comfort. The color is great. I also love the Cowmooflage. I did alot of research and love Britax for all its safety features. Would definetley recommend for a toddler.

          Comment on this review

           
          5.0

          Love them!

          By Alex

          from MD

          About Me Parent of Two or More Children

          Verified Buyer

          Pros

          • Comfortable
          • Easy to Adjust
          • Easy to install
          • Safe
          • Sturdy
          • Stylish

          Cons

            Best Uses

            • Infants
            • Toddlers

            Comments about Marathon 70-G3 - Chili Pepper:

            Easy to install, looks awesome. I got two for my boys (an infant and a toddler) and they both) love it!

            Comment on this review

             
            5.0

            Great product! Simply the best!

            By mel-e-mel

            from Los Angeles, CA

            About Me First Time Parent

            Verified Buyer

            Pros

            • Comfortable
            • Easy to Adjust
            • Easy to Clean
            • Safe
            • Sturdy
            • Stylish

            Cons

            • Hard to Install
            • Heavy

            Best Uses

            • Infants
            • Toddlers

            Comments about Marathon 70-G3 - Chili Pepper:

            I got this carseat installed at the LAPD seatcheck inspection station. And they (the real experts when it comes to everything carseat) told me MANY times what a great carseat it was! So many user friendly and safety features such as sliding harness adjustment to fit the child's size, built-in lock in feature, rubber lining at the base to prevent slipping of the carseat from the seat, etc etc (lots of jargons to me but they truly approved).
            Our 5 month old baby sat on it, fit snugly and comfortably and fell asleep as soon as I started the car. The vibrant and beautiful red color is an added bonus~

            Comment on this review

            (1 of 1 customers found this review helpful)

             
            4.0

            Great Seat!

            By aa1028

            from NJ

            About Me First Time Parent

            Verified Buyer

            Pros

            • Comfortable
            • Easy to Adjust
            • Easy to Clean
            • Easy to install
            • Lightweight
            • Safe
            • Sturdy
            • Stylish

            Cons

              Best Uses

              • Infants
              • Toddlers

              Comments about Marathon 70-G3 - Chili Pepper:

              I dont love the velcro on the sides of the harness. Ruined a pair of pants on their first wear. :( I like everything else though!

              Comment on this review

               
              4.0

              love it (so far!)

              By Annis La Guera

              from San Francisco, CA

              About Me First Time Parent

              See all my reviews

              Verified Buyer

              Pros

              • Comfortable
              • Easy to Adjust
              • Easy to Clean
              • Easy to install
              • Safe
              • Sturdy

              Cons

              • Heavy

              Best Uses

                Comments about Marathon 70-G3 - Chili Pepper:

                I did lot of research before I settled on this Britax seat. When i saw it on sale here on Diapers.com, i went ahead and bought it. For the money it seems to be the safest seat out there! That makes me feel so much better as a mom!
                And it does feel very sturdy, thanks to the metal frame, the tether straps. As a mom, i also love the removable, easy-clean fabric. I love the red color, too! I didn't want the black seat (since i read somewhere that the black 'jet' fabric contains more 'chemicals')

                Granted, we havent used the seat much yet, but so far, it lives up to my high expectations. Yes!!

                Comment on this review

                 
                4.0

                Very nice carseat.

                By mtwist

                from Chicago, IL

                About Me First Time Parent

                See all my reviews

                Verified Buyer

                Pros

                • Easy to Adjust
                • Easy to install
                • Safe
                • Sturdy
                • Stylish

                Cons

                • Bulky

                Best Uses

                • Infants
                • Toddlers

                Comments about Marathon 70-G3 - Chili Pepper:

                Britax is very easy to install in the car and easy to strap baby in. It's nice material, feels sturdy, looks attractive. It is large. I think it works best in bigger cars or at least ones with more head space when rear facing (RF). It is a tight squeeze (RF) when placed behind passenger seat in a 2005 subaru forester, and awkward to get baby in and out. However, in a hyundai elantra (2005) it fits great. I think it would work great in the middle of the backseat. Overall, we are pleased with it.

                Comment on this review

                 
                5.0

                I would buy this product again

                By new dad

                from San Francisco

                About Me First Time Parent

                Verified Buyer

                Pros

                • Comfortable
                • Easy to Adjust
                • Easy to Clean
                • Easy to install
                • Safe
                • Sturdy
                • Stylish

                Cons

                • Heavy

                Best Uses

                • Infants
                • Newborn
                • Toddlers

                Comments about Marathon 70-G3 - Chili Pepper:

                great car seat...my Son loves it

                Comment on this review

                 
                5.0

                Great choice

                By KYang

                from Clovis

                About Me Parent of Two or More Children

                See all my reviews

                Pros

                • Comfortable
                • Easy to Adjust
                • Easy to Clean
                • Safe
                • Stylish

                Cons

                • Difficult to Set Up
                • Heavy

                Best Uses

                • Infants
                • Newborn

                Comments about Marathon 70-G3 - Chili Pepper:

                I love this car seat and my baby looks like she feel comfortable in it. She out grown her infant car seat and usually cry if we put her in it but with this one, she is happy and chilling. Love the material. Very affordable. Love the color.

                Comment on this review

                Displaying reviews 1-12

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