Transforming from an all-around adjustable booster to a backless booster, the Viaggio Shuttle Plus will grow with your child! The Viaggio Shuttle Plus has the unique capability to fully accommodate a child’s growth with its 3D Total Adjust Technology. This means the booster can be adjusted in three different locations: 1) the headrest can adjust to five different positions vertically, 2) the upper backrest adjusts three positions vertically, 3) the side wings can expand out three positons. These adjustments can be made independently from each other, allowing for a truly original experience in comfort.