The health and well being of our family is something that may keep a lot of us up at night, especially if you are a new parent. With all of the dangers that the world has to offer it is important to do our part to minimize our children’s exposure to them. Having a capable car seat is one such way to elevate the protection that you provide them on a daily basis. It is easy to get caught up in the every day mundane routines of short car trips to the grocery store or the in-laws house that you forget just how perilous a simple drive end up. Below is a quick review of one of the convertible car seats that we have used for many years. I think it may have been discontinued and updated to a newer model, but the quality and features of this seat should still be relevant.

Britax Marathon Car Seat

The Britax Marathon 70-G3 has been one of the best convertible car seats available on the market for a number of years and an owner favorite. With a wide range of safety and comfort features, this model is hit with both parents and kids.. The energy absorbing Versa-Tether this car seat is equipped with makes any impact less powerful and reduces any tendency to move forward during collisions. With the integrated steel bars, kids will be properly supported during rides, also preventing the chair from moving from a side to another.

The comfortable cushions make this car seat an excellent choice for children of any age, so that they can easily go through long rides without feeling uncomfortable.The installation process you have to go through with Britax Marathon 70-G3 is very simple and easy and this car seat was also designed for air traveling, offering even more protection and versatility.

Update: The G3 has apparently is no longer made as the company has made improvements and updated their line of convertible car seats. The Britax Marathon G4.1 is the latest generation of this safety seat and one that I would probably invest in after our excellent experience with the G3.

Car Seat Features

Simple Installation Process – With the premium lower latch connectors, Britax Marathon 70-G3 can be successfully installed to your back seat in minutes. If necessary, the car seat can be easily uninstalled through the push-button system, which will help you save a lot of time if you are in a hurry.

Safety Features – The Britax Marathon 70-G3 is designed with several safety features, providing the best possible protection for the unexpected. The Harness Ultra Guard System aims to provide resistance to forward movement in case of a car accident, preventing your child from suffering an impact with the seats in front of him. The Versa-Tether foam can absorb energy that shows up as a result of a car accident. The EPP foam features in the side impact protection system can distribute crash forces evenly, preventing injuries and shielding your wee one from vehicle intrusions.

Adjustable Height – For most customers, easily adjusting the seat is an important feature that can allow the car seat to grow along with their child. The G3 comes with several adjustable height positions, so that you can keep your child comfortable in their first few years. There are also two buckle positions, so it can accommodate children of any age or size, allowing them to feel more comfortable.

Enhanced Comfort – The high-density foam cushioning of this Britax Marathon car seat offers enhanced comfort that will definitely make your child enjoy car rides more than ever before. The infant body pillow is ideal for both infants and bigger children, and you might even find your little one sleeping comfortably during the car ride.

What Is There To Like?

This model has been a big hit with a lot of parents. Some of the aspects of this child safety seat that owners really rave about include;

Comfortable Materials – Owners really love this about their Britax Marathon 70-G3. You not only want a car seat to protect your children but you also want something that they will enjoy riding in, and this unit really seems to deliver with comfortable cushion material. The seat is nicely padded, and the velcro can prevent the buckles from getting under your child’s torso successfully.

Excellent Security – This is probably the most important aspect of any child car seat and owners really like how this model performs. The Britax Marathon 70-G3 comes along with enhanced security features that can keep this car seat into place without moving around the interior of your car. There are a few customer reviews that reference how well this unit performed in an actual crash and how thankful that they were to have been using this car seat.

Good Dimensions – Moreover, this car seat has good dimensions that can basically fit any car. Users tended to find that this model was great in small, medium or large vehicles and found this model very easy to install and adjust.

Easy Installation – Parents for the most part did not have too much trouble installing, removing or moving their G3 in and out of their vehicles.

Could Use Improving

Confusing User Manual – Even though the installation process is basically simple, customers have had problems with the user manual, which was rather complicated and confusing.

Durability – For the most part owners are satisfied with this car seat’s performance, but there were some users that were not happy with the overall durability of this model.


For those wanting the top of the line car seat that both protects their children and provides them with a comfortable ride, then you really can’t go wrong with the Britax Marathon 70-G3. Some serious engineering has gone into this product to ensure the maximum amount of safety for just about any situation. Parents who have purchased this model rave about it and it constantly receives some of the highest customer ratings and recommendation rates. This is definitely a top choice among owners.

Although there has been a couple of recent Britax recalls, we still trust this company and love to use there seats. We have no reservations about recommending their products but if it makes you uneasy there are other reputable makers out there to choose from. As always, reading the manual on any type of car seat you purchase is vital as an improperly used seat presents its own set of dangers to your child. Stay healthy, stay safe and keep your eyes on the road.