If you like the legendary Britax Roundabout® and Marathon?, you are going to love the Britax Decathlon? convertible car seat! The Decathlon? has been designed to take our renowned focus on safety, comfort and convenience a step further. Unique features including the sculpted base, push button release LATCH system with patented Versa-Tether®, and built-in vehicle belt lock-offs make a tight installation in your vehicle quick and simple. The tangle-free polyester 5-point harness and push button harness adjuster help you to effortlessly secure your child every day. Achieving the ultimate in luxury and comfort, the Decathlon? offers a 3-position crotch strap, patented HUGS? system, belly pad and a plush & washable seat cover. The removable toddler head pillow and infant positioning system for newborn babies provides a comfortable, adjustable fit as your child grows. The Britax Decathlon? is the ultimate convertible restraint for children from 5 to 65 pounds.