The Diono Radian 3RXT SafePlus convertible car seat and Diono Ultra Mat and Heat Sun Shield car seat protector make an ideal bundle for safe and comfortable travel with children. The Radian 3RXT SafePlus is an innovative 4-in-1 convertible car seat accommodating children from 4 to 120 pounds, spanning from infant to booster mode. It provides complete protection with proprietary SafePlus engineering like an anti-rebound panel and advanced side impact protection. The seat is made of reinforced steel and adjusted via a 12-position headrest. Slim dimensions allow fitting 3 seats across most vehicles. The Diono Ultra Mat and Heat Sun Shield is a full coverage backseat protector shielding against damage from car seats. Its 5-layer high strength water resistant material resists spills and scuffs. Top and bottom grip surfaces keep the protector firmly in place. An integrated sun shield prevents hot car seat surfaces that could burn children. Storage pockets organize travel accessories. Together these Diono products offer a comprehensive solution for safe and comfortable travel with kids, protecting both child and vehicle. The Radian 3RXT SafePlus serves as an adaptable long-term car seat while the Ultra Mat and Heat Sun Shield protects backseat upholstery underneath.