Sunbrella itself offers an unmatched history of quality, durability and exceptional good looks. The fabric is solution-dyed, the color actually added during manufacturing of the synthetic thread fiber, to become part of the thread itself. That means the robust curtain hue you started with will stay true for seasons to come. Sunbrella is heavy-duty yet lightweight acrylic blend that is resistant to staining, rot, mold and mildew, yet has a softness on par with cotton. The Tab Top curtain is simple to hang, or to take down; the fabric tabs running along the top edge slide directly over a stationary drapery rod.