Britax Marathon 70-G3 Convertible Car Seat, Onyx

MARATHON 70-G3
Convertible Car Seat
(Onyx)

At a Glance:

• Side Impact Protection system with energy-absorbing foam diverts crash forces
• Base with SafeCell Technology compresses to counteract forward momentum
• Energy-Absorbing Versa-Tether anchors seat and slows forward movement
• Integrated steel bars reinforce seat stability
• Tangle-free, no-rethread, five-point harness provides a secure fit

Age/Weight Requirements:

5 to 40 pounds rear facing; 20 to 70 pounds forward facing

Warranty:

Limited one-year warranty

With the Side Impact Protection system, energy-absorbing foam helps divert crash forces. View larger.

SafeCell Technology helps to minimize the risk of head injury during a collision. View larger.

The EZ-Buckle System maintains the harness buckle in a forward position to prevent your child from sitting on it when boarding. View larger.

Side Impact Protection System Diverts Crash Forces

The BRITAX Side Impact Protection system includes a rigid shell with deep sidewalls lined with energy-absorbing EPP foam to contain your child's head and body and divert crash force energy while creating a barrier against possible intruding objects. This system also protects your child's head and chest.

SafeCell Technology for Advanced Protection

The base of the MARATHON 70-G3 includes SafeCell Technology comprised of SafeCells, an engineered material designed to compress in a crash. This compression lowers the center of gravity to counteract forward rotation of the seat, helping to minimize the risk of head injury during a collision.

Located in the sides of the seat shell, integrated steel bars strengthen the connection to the vehicle and prevent forward flexing of the seat during a crash to reduce the risk of head injury.

In the event of a sudden stop, the Energy-Absorbing Versa-Tether strap restricts forward movement and reduces crash forces with patented staged-release webbing and a 2-point attachment. This webbing securely anchors the top of your child seat to your vehicle in either rear- or forward-facing positions.

No-Rethread Harness System and Comfort Features

The tangle-free, five-point harness allows for multiple height positions and can be adjusted without dismantling the harness or removing the car seat from the vehicle. Two buckle positions provide a snug, comfortable fit as your child grows. The seat's harness holders prevent the straps from getting in the way when you're putting your child in the seat, while the EZ-Buckle system maintains the harness buckle in a forward position to prevent your child from sitting on it when first entering the seat. Rear- and forward-facing recline options, as well as high-density foam cushioning, help your child relax on the journey. And the plush cover comes with matching comfort pads and an infant body pillow to keep children of all ages comfortable and secure.

Easy Installation and Airplane-Approved Design

The MARATHON 70-G3 takes the guesswork out of installing your car seat thanks to a range of convenience features. An anti-slip, contoured base grips and protects the vehicle seat. Premium lower LATCH connectors make for a quick, simple, and tight installation, while the push-button allows you to easily uninstall the car seat. And easy-to-access built-in lock-offs provide a secure installation when using the vehicle lap and shoulder belt.

The MARATHON 70-G3 has a durable cover that can be removed for easy cleaning without uninstalling the car seat. It's also approved for airplane travel.

Product and Warranty Information

The BRITAX MARATHON 70-G3 is made in the USA, has a seven-year life, and is backed by a manufacturer's limited one-year warranty.

What's in the Box

BRITAX MARATHON 70-G3 Convertible Car Seat, removable cover, comfort pads, infant body pillow, and user guide.

Click here to compare BRITAX car seats.

ROUNDABOUT 55

MARATHON 70-G3

BOULEVARD 70-G3

PAVILION 70-G3

ADVOCATE 70-G3