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 padded clasp exterior measurements 45 5 x 47 x 72 89 weight 11 kg adjustable backrest height adjustable adjustable headrest 11 x colour blue seat reducer manufacturer specific features lsp system slip cover washable cover