The baby or child's height is used to determine if the seat fits the child, rather than their weight. i-Size includes a side impact test to ensure that the seats provide better protection from side impacts.

In addition to the patented 3-position reclining headrest that prevents the child’s head from falling forward when asleep, the Linear Side-impact Protection (L.S.P. System) absorbs the energy of a side-impact collision at a very early stage and protects the sensitive head and shoulder area. The ISOFIX Connect System further enhances stability and safety. This user-friendly car seat is also compatible with cars that are not equipped with ISOFIX. There are 11 height adjustments from which to choose. At the highest setting, the shoulder belt guide is about 19.75″. The lowest setting is around 12.5”. I went a little video crazy, but we love videos to show how things work here at CarseatBlog, so have fun watching! The Linear Side-impact Protection (L.S.P. System) provides extra safety in the event of a side-impact collision. The Linear Side-impact Protection System (L.S.P. System) systematically absorbs the force of a side-impact collision in a linear series of reactions through the use of the shoulder and head protectors. At the same time, the body’s kinetic energy caused by the impact is absorbed at a very early stage and the head is actively led into a safe position.Patented reclining headrest – The 3 position reclining headrest helps prevent the child’s head from falling forward while asleep. More than 10 years of usability – This 2 in 1 seat protects your child with an impact shield until they are 21kgs and then by removing the impact shield and using the vehicle seatbelt until they reach 150cm.

Lie-flat seats - Research shows that it’s healthiest for newborn babies to lie flat for the majority of the time when they’re sleeping or lying still for periods. The CYBEX Cloud Z i-Size features an ergonomic lie-flat position outside of the car. The CYBEX Solution X-Fix car seat was named test winner Gr. 2/3 by leading German independent consumer testing oganisation, Stiftung Warentest (06/2009) and has received numerous awards from the most renowned European consumer testing institutions.UK law dictates that all children must travel in an appropriately sized car seat until they are 135cm tall or 12-years-old, whichever comes first.