Designed to be the only car seat you'll ever need for your child, the Maxi-Cosi Magellan XP comfortably seats your child from birth to 10 years old and from 5 to 120 pounds.ith plush, full-featured European design, it protects with a seven-position recline, the only adjustable torso side-impact protection with three torso height positions, and 14 headrest heights that raise the harness automatically for best fit. Easily transform the seat to booster mode with the Hideaway Harness. Integrated belt lock-offs for easy and secure installation, and one-click LATCH connectors install and release easily.