ZIPRAL Zip Shade Systems fix the fabric inside the profile on both sides with its special zipper system in its frame. Unlike ordinary roller blinds, the system ensures that the fabric stands upright, fixed, and smooth, by means of the mechanism and zipper inside the railed profile, while at the same time it provides resistance against the wind. With this feature that prevents the curtain from flying and fluctuating in the wind, it can be used on the outer surfaces as well as the inner surfaces of the windows.