The Tropic Weave Sun Shades are woven of a thin elegant fabric that is fashionable for any home"s exterior or interior. The light filtering weave reduces glare without darkening a room"s interior and also protects your furnishings from the sun"s harmful rays. The sun shades fabric significantly blocks the suns heat, allows air flow, which allows your home or business to stay cooler, reducing energy costs. This special fabric is resistant to fading, mold and mildew and is easy to keep clean. The smooth action roller clutch mechanism is designed to provide a smooth even roll even when exposed to extreme weather conditions and the stainless steel tie downs are a stylish finish to secure the blind in the down position.