Keeps the childs sensitive head and neck within the safety zone of the seats head and neck protectors AUTOMATIC HEIGHT AND WIDTH ADJUSTMENT From 3-12 years, the time during which this car seat is used, children grow an average of 60 cm. The 12-position height- and width- adjustable Elian-Fix grows with your child: a maximum of 8 cm in width and up to 20 cm in height. AIR VENTILATION SYSTEM A system of mesh ventilation channels runs through backrest and seat. Air circulates through ventilation holes under the seat cover and ensures a comfortable seat climate even on hot days. LINEAR SIDE-IMPACT PROTECTION The Linear Side-impact Protection (L.S.P. System Plus) absorbs the forces of an impact in combination with the energy-absorbing shell.