Package includes jane montecarlo r1 group 23 isofix car seat jane xtend group 1 impact shield jane xtend group 1 impact shield jane xtend impact shield technically known as an impact shield xtend is a protective cushion that effectively operates as a child retention system the easy to use accessory means that children of between 9 18kg group 1 can safely travel in seats that are designed for group 2 and 3 essentially by adding the xtend to either montecarlo model the car seat can be us