Coolaroo Exterior Window Shades are the ideal solution for reducing temperature within your home. Made from Coolaroo's unique knitted all weather fabric, they block up to 90% of the sun's UV rays yet still allow air to flow through. This breathable fabric not only significantly reduces temperatures behind the window shade but still allows just the right amount of light transmission to ensure you can always see what's happening outside. The classic series sun shades havve the traditional bottom roll-up. Wood screws are included for easy installation.