Britax is known for producing car seats with top-of-the-line quality, top-notch safety records, and top-dollar prices. Their LATCH-equipped Marathon convertible seat is no exception.

The Marathon fits children 5 to 65 pounds and 18 to 49 inches, and can be used rear-facing from 5 to 33 pounds (much longer than many infant and convertible seats on the market). It is LATCH compatible to 48 pounds. The Marathon is taller and accommodates higher weights than the Britax Roundabout (which goes to 40 pounds), but it's not as tall and won't last as long as the Britax Husky (which goes to 80 pounds). It should be noted that the Marathon may not last through the entire 65-pound limit, however, as many children outgrow even the generous height limit of this seat before they reach that weight.

The Marathon manual offers detailed instruction on LATCH, lap/shoulder-belt, and lap-belt-only installation for both rear-facing and forward-facing positions (also be sure to see VersaTether guidelines); all installation methods are somewhat complicated but well worth the effort when the seat won't budge.

The Marathon offers upright and recline options (for less than 33 pounds) and a streamlined base to fit most any vehicle. The seat features a modified E.P.S. foam insert that allows for even more spacious shoulder width without compromising integrity and is approved for aircraft use. Side Velcro keeps the harness straps out of way as the child loads into the seat.

The four-position harness grows as your child does, the patented HUGS shoulder pad system keeps the straps from twisting, and the buckle can be inserted one tongue at a time. Pull the up-front harness adjuster out straight (not up) to prevent fraying. The plush, suede-like fabric cover is offered in 11 patterns (some subtle and neutral, others whimsical and fun) and can be removed for hand washing and line drying.

The Britax Marathon is a fine middle choice for a convertible car seat.

Warranty
1 year, limited