Maxi-Cosi Kani 4-in-1 Convertible Car Seat - Authentic BlackAll in One Convertible Car Seat Built to Grow With Your Child From Birth to 10 Years. The Maxi Cosi Kani is a long lasting, all in one car seat designed to adapt to every stage of your childs growth. From the very first ride home to their last booster seat days, the Kani delivers unmatched comfort, style, and safety all in a space saving design perfect for most vehicles. Key Features 4 in 1 Versatility Easily transitions through four modes to