Shown in Monti

Nautilus Elite 3-in-1 Car Seat helps keep your child in a 5-point harness up to 65 lbs. Converts to a belt-positioning booster seat, and finally to a Highback or Backless booster, for a comfortable fit up to 100 lbs. This seat has been extensively crash tested and outfitted with reinforced steel for enhanced durablity. There's also an integrated seat belt lock-off to simplify seat belt installation for you, and a two-way adjustable headrest that changes with your growing child.