The best materials for car umbrellas PVC fabric umbrellas Korean or German: The most common and requested option; because they are fire-resistant, completely insulated from rain and dust, and can withstand high temperatures. Polyethylene fabric umbrellas: Characterized by their high flexibility and superior ability to circulate air and reduce heat, while providing up to 95% shade, and they are cost-effective. Iron umbrellas and metal sheets (Shinko/Cladding): They provide protection and a solid structure that lasts for many years without maintenance, and come with a coating resistant to rust and moisture.