Like Evolution4, NOAH fabric is engineered for exceptional resistance to rain, snow, dust and UV rays. At the same time it lets the paint and finish 'breathe', allowing moisture trapped under the cover to evaporate. The exterior layer defends against scratches, dirt, bird droppings, etc. while the soft-touch inner layer pampers the finish. And NOAH weighs just 4 1/2 ounces per square yard so it's easier to put on and take off than Evolution4.