Silver Cross Jet Car Seat Adaptors With the silver cross Jet car seat adaptors, you have a way of being able to add a car seat onto your Silver Cross Jet pushchair. Super easy to use, the car seat adaptors provide a safe and comfortable system of travel for your child. You will have to simply remove bumper bar and add your Jet car seat adaptors to the chassis to create your own travel system, taking no time at all to do. The simple and easy push button release system means using your Simplicity car seat with the your Jet pushchair couldn’t be easier.