What you can use depends on how rigorous the weather is on the furnishings. In a relatively moisture-free hot climate, for instance, sun resistance is the quality you want to look for, but mildew resistance is not essential. In other areas, both sun and moisture (caused by dew at night) can damage the goods. Select products specifically resistant to mold and mildew and ultraviolet rays. Choices abound for products that work well in a protected outdoor environment.
Here’s some guidance on which are suitable for the outdoors. Shades and Blinds: Simple matchstick or rattan rollups can protect furnishings from some rain and sun. Other treatments might include fabulous see-through screens and blinds that block ultraviolet rays while allowing breezes to waft through the space. Shower curtains or simply made fabric curtains are decorative solutions that add privacy as well as beauty.