This new innovative back cushion comes with a pre-installed cold/heat pack insert for the ultimate soothing and healing experience, all for your comfort. Its new contoured foam is perfect for everyday use and can also be used without the heat/cold pack, all according to what you prefer. You can heat the pack in a microwave and similarly cool it in a freezer too. This stylish black cushion also comes with an adjustable strap that will attach easily to your car seat. Is cover zipper is removable and washable as well. The material used is polyester making it the perfect cushion for your ease.