The Jane Montecarlo Plus With Extend provides your child with complete lateral protection. Extension of the backrest adds height to the seat, while the sides of the headrest & lumbar area can be extended to increase width. The car seat's aluminium structure improves protection by 70 percent compared to a traditional system. But that's not all. The wrap around shape & larger sized headrest increases stock absorption caused by impact & offers greater cushioning. Tilting sides provide optimum support for a restful journey & the internal fabric is breathable to maximise comfort. The Montecarlo also features aeration vents to ease your child's breathing & perspiration. The Jane Montecarlo Plus car Seat is suitable for group 2-3, 3 yeras to 12 years, however when used with the included Jane XTEND Impact Shield the Montecarlo Plus becomes suitable for group 1, 9 months to 12 years.