Coolaroo exterior roller shades combine unique knitted fabric and classic design. Unique, knitted HDPE fabric in traditional shade styling blocks up to 80-percent of damaging UV rays. Breathable fabric allows air flow, substantially reducing temperatures and saving up to 40-percent on energy costs. The weather resistant fabric and components resist fading, mold and mildew, ensuring your shades will look great for a long time, no matter the weather they are up against. Light filtering knit reduces glare without darkening a room's interior. These shades provide a fresh, unique, stylish addition to any décor. We recommend that when the crank is not in use, it be stored away from salt air elements.