The Diono Radian 3RXT SafePlus All-in-One Convertible Car Seat and Diono Ultra Mat Complete Back Seat Upholstery Protection bundle keeps your child safe and comfortable while protecting your vehicle's interior. The Radian 3RXT SafePlus car seat provides complete protection for children from 4 to 120 pounds with its innovative 4-in-1 design that transitions from rear-facing infant car seat to forward-facing toddler seat and finally to a belt-positioning booster. It features Diono's SafePlus engineering with an anti-rebound panel, side impact protection, and a steel frame for maximum safety. Weighing only 27 pounds, its slim design allows three car seats to fit across most midsize vehicle back seats. The Ultra Mat seat protector complements the Radian car seat by shielding the entire back seat area from damage, with a water-resistant top layer and anti-slip bottom to keep the car seat firmly in place. Its high-density foam panels prevent upholstery indentations while the three mesh pockets offer handy storage. Designed for safety, Ultra Mat is rigorously crash tested to provide an extra layer of protection. With the Radian's 4-in-1 design that grows with your child and the Ultra Mat's durable, protective barrier, this bundle simplifies your family's travels and daily commutes while prioritizing safety and interior preservation.