Britax Kidfix III S (15 - 36kg) Designed to become the most comfortable high back booster seat in the market, KIDFIX III S’s excellent ergonomic design also provides greater comfort for your child, even on lengthy journeys. XP-PAD to protect your child's head and neck in the event of a frontal collision It prevents the impact of your child's chin on their chest, absorbing up to 30% * of the energy. The SecureGuard helps to keep the lap belt in an optimal position over your child’s pelvic bones. Therefore reducing abdominal forces in the event of a frontal collision by up to 35%*. SICT provides superior side impact protection in the event of a side impact with deep and softly padded side wings. To benefit from the protection, simply adjust the SICT on the side of the car seat closest to the door. The longer seating area (approx 20% larger than similar models) with its soft front section ensures an even more comfortable and ergonomic leg position, also for taller children. The wider V-shaped backrest grows with your child, offering a cosy fit for smaller children and providing more space as they grow.. Plus, the backrest automatically adjusts to match the angle of the vehicle seat, providing a better fit and a comfortable position for your child. The headrest can easily be adjusted to the correct position, just above your child’s shoulders, with one hand – even while they are sitting in the seat. Plus the headrest is ergonomically designed to support your child’s head when they fall asleep. Can be installed with ISOFIX or with car seat belt only. Measurements: Height 67 - 85cm, Width 54cm, Depth 43cm Weight: 7.5kg Vehicle List Instruction Manual Vehicle List for checking fitting compatibility with your vehicle. Instruction Manual for installation and Britax Kidfix III S car seat information.