Easy Installation: Built-in Insta-Install Rigid LATCH installs safely in seconds.* *Stay-in-car base is included, but not required for install PureProtect Fabrics are soft and fire-resistant without added chemicals, for another layer of protection to ensure your baby is always safe and comfortable Protects rear-facing infants from 4-30 lb and up to 32" 4-position, 1-hand recline with memory recline on LATCH connectors remembers the last install recline position; Easy-to-read bubble level indicator helps eliminate installation guesswork, allowing you to check that your child is at the perfect recline position No-Rethread Simply Safe Adjust Harness System allows you to adjust the headrest and harness together while your child is in the seat