3-in-1 car seat grows with your child from 4-100 lb 5" adjustable extension panel provides a The Graco Extend2Fit 3-in-1 Car Seat features a 4-position extension panel that provides up to 5" of extra rear-facing legroom, allowing your child to ride safely rear-facing longer. Children are safer riding rear-facing and should ride rear-facing as long as possible, until they reach the maximum rear-facing height or weight rating for their car seat. With Extend2Fit, the adjustable extension panel and 50 lb rear-facing weight limit allow the seat to grow with your child in rear-facing mode, providing extended rear-facing use. This seat offers 3 modes of use to grow with your child from rear-facing harness (4-50 lb) to forward-facing harness (22-65 lb) to highback booster (40-100 lb). The seat features the No-Rethread Simply Safe Adjust Harness System, which allows you to adjust the height of the headrest and harness in one motion, and InRight LATCH for a one-second LATCH attachment. Harnessing is made easier with fuss-free harness storage pockets that conveniently hold the harness out of the way while you get baby in and out of the car seat. 3-in-1 car seat grows with your child from rear-facing harness (4-50 lb) to forward-facing harness (22-65 lb) to highback booster (40-100 lb) Car seat with 4-position adjustable extension panel provides up to 5" additional legroom, allowing your child to safely ride rear-facing longer Up to 50 lb rear-facing, allowing your child to safely ride rear-facing longer Graco ProtectPlus Engineered: a combination of the most rigorous crash tests that helps protect your child in frontal, side, rear & rollover crashes; additional testing based on the New Car Assessment Program and for extreme car interior temperatures No-Rethread Harness: Simply Safe Adjust Harness System allows you to adjust the headrest and harness in one motion, helping to save you time and ensure your child is always properly secured Keep your child comfortable with 10 headrest positions and removable head and body infant inserts; 6 recline positions help with installation and ensure a comfy ride