The Clek Fllo is the 3-across convertible car seat! At less than 17 inches, Fllo makes it easy to ride 3-across. One of the safest narrow car seats available, it’s packed with industry-leading safety features, including a steel anti-rebound bar, Clek’s patented energy management system – and advanced side-impact protection with deep side wings, energy-absorbing foam layers and an adjustable structural headrest.