Thanks to a unique installation system, iZi Comfort X3 is much easier to install than any other belt fixed seat. This means much higher safety for your child. Be Safe iZi Comfort was scored ?Best? when tested by ADAC in 2003. The seat can be adjusted into several different sitting positions without re-tightening the car seat belt. The built in side impact protection keeps the head, neck and body safe. Side Impact Protection (SIP) The seat provides excellent side impact protection for the head and body. It is padded on the inside with impact-absorbing material. Easy and safe installation The revolutionary belt routing system offers unique benefits. You can see exactly what you are doing, as the belt goes in front of the seat and not behind it as with some other brands. Very good sleeping positions Several sleeping positions with easy adjustment for optimal comfort. Features: Head support and shoulder belts can be adjusted to their correct height with 1 operation in 8 positions SIP - Sid