This test methods provides a means for determining the weather resistance of textile materials. 1.2 The test options described below are applicable to fibers, yarns and fabrics and products made therefrom, including coated fabrics, whether natural, colored, finished or unfinished. Test options included are: A-Sunshine-Arc Lamp Exposure with Wetting B-Sunshine-Arc Lamp Exposure without Wetting 2. Principle 2.1 Test specimens and agreed upon comparison standard(s) are exposed simultaneously to light source under specified conditions of either relative humidity or wetting.