Aton S2 i-Size Car Seat - Moon BlackAton S2 i Size (0 13 kg) Approved to the latest UNECE safety standard R129 03, the Aton S2 i Size features integrated and extendable Linear Side impact Protection (L. S. P.) for better safety in the event of a side crash. Thanks to the 11 position adjustable headrest, the seat can keep up with your childs development for up to 24 months. Additionally, the integrated and foldable XXL sun canopy provides shade in the car and shields your baby from the