Instant Relief From the Sun's Heat. SunTex® is a unique woven mesh that can block 90% of the sun's hot rays before they enter your windows. SunTex® is ideal for use as a shading fabric on windows, doors and porches and offers good ventilation. This heavy-duty fabric made of strong vinyl-coated polyester is resistant to pet damage. Developed originally for use in outdoor furniture. SunTex® is mildew and fade resistant and needs only an occasional cleaning with mild soap and water. SunTex® 90 is available in several fabric colors and frame colors.