An award winner that really does grow as your child does. Ergonomically designed to suit children at any stage between the ages of 9 and 36 kg (9mth-11yrs), making it the most flexible of Britax car seats, ideal for grandparents and those regularly driving children of varying ages. From 9-18 kg (9mth-4yrs) the seat is used with the integral easily adjusted 5-point, one-pull harness. From 15-36kg (4-11 yrs) the harness stows away and the seat is used as a high backed booster seat with your car?s own seatbelt. Belt guides correctly position the adult seat belt safely and comfortably over your child. Features: From 9 to 18 kg Five-point, one pull safety harness. Side impact protection with deep, softly padded side wings. Performance chest pads. A one-pull, height-adjustable headrest and harness moves up easily as your child grows. Harness retainers make it easy to take your child in and out of the seat Drink and snack holders on both sides Features: From 15-36kg Seat shape correctly positions the lap belt low over your child?s pelvis Seat belt guide positions the diagonal belt correctly over their shoulder. Height-adjustable headrest moves up easily as your child grows and gives extra comfort to your sleeping child. Choice of upright or reclined position for a more comfortable ride. Designed to fit modern sculptured car seats. Removable, machine washable cover.