Designed for longevity, the radian r100 convertible car seat offers ultimate protection for your child. Premium safety features like a full steel alloy frame, aluminum reinforced side walls and energy absorbing EPS foam provide peace of mind. It comfortably seats rear-facing children from 5-40 lbs., forward-facing children from 20-65 lbs. in a 5-point harness, then converts to a booster seat for children up to 100 lbs. The seat is NCAP crash tested, the industry benchmark for verifying child seat performance in severe accident conditions. The radian r100 folds flat for easy transport and is FAA certified for airplane travel. The super slim design allows you to fit 3 across in most mid-sized vehicles, making it the perfect choice for growing families. With a 10-year lifespan, the radian r100 could be the only convertible car seat you'll ever need.