It is made up of pure marble balls and good plastic wires, so has a long lasting life. Gives cool feeling while driving the car. Padded surround for added comfort. It is suitable for use on fabric & leather seats. Anti-slip backing with adjustable strap. Allows circulation of air. This product is a universal model, it will fit to any car. Very easy installation, just need to tie the two threads in backside of the car front seat. Gives you very comfortable journey and will reduce the human body heat while driving long distance. Gives relief to your back body and it is like accu puncture treatment, this will avoid the medical problem like piles, body heat, blood pressure.