Diono designs and manufactures safe, innovative car seats, booster seats, strollers, and accessories for today's on-the-go families. Diono was the original manufacturer of the 3-across car seat. Diono products secure and protect children through every stage of development. With more than a decade of experience, Diono is recognized by consumer and trade organizations in Canada for its unique functionality and thoughtful design. Shop Diono products and get free shipping on orders over $49*! Read our Radian Car Seat Comparison featuring the Radian 3R, 3RX, 3RXT, 3QX and 3QXT convertible car seats.