Outdura™ outdoor fabric is 100% solution-dyed acrylic. This is a process in which the pigment is added during the fiber production. The dyed fibers are spun into yarn resulting in a color that permeates the fabric rather than just sitting on top if the fibers. Outdura outdoor fabric is water-repellent not water proof. It will repel water but eventually it will soak through the fabric. During the finishing process, a water-repellent finish is applied to the fabric. Normal wear will reduce the effectiveness of this finish. Most Outdura fabrics have been tested and proven to provide up to 98% UV protection from the harmful effects of the sun.