Help keep your child harnessed as long as you can and if you can do that without buying a procession of car seats, even better! The new Nautilus 3-in-1 Car Seat is the only forward-facing car seat your child will need. It helps keep him safe in a 5-point harness longer than most car seats ? all the way up to 65 lbs. Later, the seat converts to a highback booster then backless booster, for comfortable, custom protection up to 100 lbs. Extensive crash testing and a steel-reinforced structure give parents peace of mind, while the height adjusting head support and extra-comfy seat with wide armrests, cup holder and side storage help your precious passenger relax and enjoy the ride. Features:, Extended 5-point harness fits kids up to 65 lbs. to keep them safer longer, Converts from 5-point harness to High-Back Booster for children 30-100 lbs. and Backless Booster for children 40-100 lbs., Steel reinforced structural frame: Steel reinforced frame provides strength and durability, 3-position recline to get the correct installation and comfort, Wider, padded armrests are extra comfy, Head rest can be easily adjusted in one hand so it changes with child's growth, Engineered and crash tested to meet or exceed US standard:, U.S. Compliance Standard FMVSS 213, New Car Assessment Program (NCAP) ? peak Crash Force approximately 2X Car Seat Standard, Extreme Car Interior Temperatures, EPS, energy absorbing foam, Cup holder and convenient side storage keep must-haves handy, Open loop belt guides easily position your vehicle's seatbelt, Recommended Use:, 20 - 65 lbs. 5-point harness, 30- 100 lbs. Highback Booster, 40- 100 lbs. Backless Booster, Dimensions: 20" x 22" x 29"