Britax Marathon Infant/Child Car Seat, Onyx

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    Britax Marathon Infant/Child Car Seat, Onyx



    • Britax Marathon Infant/Child Car Seat is an excellent choice for getting your family where they need to go safely and comfortably
    • SafeCell Impact Protection surrounds your child in safety and Complete Side Impact Protection shields your child in a protective shell designed to absorb crash forces and protect from debris
    • 10-Position, quick-adjust harness makes it easy to ensure the proper fit as your child grows
    • 2-Position buckle allows you to easily move the harness upward and buckle outward for a comfortable, secure fit as your child grows
    • 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
    • Easy-remove cover for cleaning convenience
    • Convertible car seat: rear facing from 2.3-18.3 kg (5-40 lbs), forward facing from 10-29.5 kg (22-65 lbs)


    • Child Car Seat Type:

      Rear facing & forward facing
    • Package Depth (cm):

      46.00 cm
    • Package Depth (in):

      18.11 in
    • Package Height (cm):

      66.00 cm
    • Package Height (in):

      25.98 in
    • Package Weight (kg):

      8.80 kg
    • Package Weight (lb):

      19.40 lb
    • Package Width (cm):

      47.00 cm
    • Package Width (in):

      18.50 in
    • Stage:

      Stage 1 & 2


    This product carries a 1 year exchange warranty redeemable in-store.