Can I use a seat protector? September 03, 2020 07:12 Updated Orbit does not recommend using any product that has not been crash tested with the car seat. Related articles Why do I need to register my car seat? Does my car seat expire? When does my car seat expire? What harness slot should I use? My car seat hangs over the edge of the vehicle seat, is that allowed? Can I add products to my car seat?