The ezyfit booster seat is ideal for children who have out grown their seat with in-built harness (approximately 4 years of age) until they reach the upper shoulder height marker (approximately 8 years of age). The ezyfit booster is suitable from 4 to 8 years of age approx. It features side wings for side impact protection and the removable cover is machine washable. The height adjustable head rest with deep side wings offers maximum protection that will support a child's head while travelling.