Product Q&A Shipping & Returns The BRITAX MARATHONTM convertible car seat is designed for children rear facing from 5 to 40 pounds and forward facing from 20 up to 65 pounds. The MARATHON 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 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 infant pillow is provided for extra comfort and infant positioning.

• 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
• Tangle-free, five-point harness distributes crash forces across the strongest parts of the body and provides a secure fit
• Two buckle positions for your growing child
• Infant positioning pillow offers extra comfort while achieving proper harness fit for small infants
• Premium lower latch connectors for a quick and simple installation featuring a push button for easy release
• 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