The BRITAX MARATHON™ 70-G3 convertible car seat accommodates children rear facing from 5 to 40 pounds and forward facing from 20 up to 70 pounds. The MARATHON 70-G3 is purposefully designed and engineered to minimize the forward movement of your childs head during a frontal impact to reduce the risk of head injury with the following revolutionary BRITAX head safety technologies:

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.

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 two-point attachment and staged-release tether webbing to slow the forward movement and reduce the crash forces reaching the child.

The MARATHON 70-G3 also incorporates BRITAX Side Impact Protection to contain the child and protect from the most severe types of crashes. The five-point harness is tangle-free with an EZ-buckle system to retain the harness buckle in a forward position and harness holders that keep harness straps pulled to the sides to make boarding quick and hassle-free. Other features include a no-rethread harness and an easy-remove cover that also allows access to belt paths from the front of the seat, while the multiple buckle and recline positions, comfort pads, and infant body pillow provide premium comfort and positioning.

360 Degree Protection Features

Base with SafeCell Technology® features SafeCells 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

HUGS™ (Harness Ultra Guard System) Chest Pads provides resistance to forward movement in the event of a crash

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

Cup holder Included

Superior Fit and Comfort Features

70-pound Weight Capacity for safety and comfort as your child grows

Rear and Forward Facing Recline for child comfort and positioning

High Density Comfort Foam provides an extra layer of padding to gently cushion your child

Plush, Easy-Remove Cover with matching comfort pads and Infant body pillow to provide extra comfort and easy cleaning without disassembling or uninstalling the child seat

Two Buckle Positions for your growing child

Infant Positioning Insert may be necessary for small infants to achieve a snug fit of the harness around your child (sold separately)

Superior Ease-of-Use Features

Quick-Adjust Harness repositions the harness shoulder height without disassembling the harness straps

Premium Lower LATCH Connectors for a quick and simple installation featuring a push button for easy release

EZ-Buckle System retains the harness buckle in a forward position and prevents the child from sitting on the buckle when boarding

Harness Holders keep harness straps pulled to the sides when placing your child in the car seat

Built-in Lock-Offs ensure a snug lap and shoulder belt installation with minimal effort

Anti-Slip, Contoured Base grips and protects the vehicle seat while offering optimum vehicle fit