The britax kidfix xp sict44 is suitable from 15kgs to 36kgs or 4 years to 11 years offering older children a safe and comfortable seat44 providing superior protection with the retractable isofit system that anchors the child seat directly to the car the 3 point seat belt then secures the child in the seat britax kidfix xp sict44 is unique in its category because of the combination of energy absorption and the removable sict for correct positioning on the door side this means under ce