Child car seat series cybex silver carry weight 9 36 kg age 9 months 12 years group 123 with isofix side impact protection harness system impact cushion padded seat belt exterior measurements 45 5 x 55 5 x 73 90 weight 11 kg headrest function tiltable headrest adjustable backrest central belt adjustment height adjustable adjustable headrest 11 x colour black seat reducer manufacturer specific features lsp system slip cover washable cover