Sunbrella is made of 100% solution dyed acrylic canvas. It is a breathable, water, and mildew resistant canvas. It comes in a 54" furniture weight and a 60" awning and boat top weight. The furniture weight is good for indoor and outdoor use. Makes great curtains and slipcovers or for replacing those old deck cushions. The awning weight is a great choice when you need something to weather the elements. A very durable fabric for boat tops, awnings, canopies, umbrellas, covers and much more.