Improve Sleep Quality: Blackout Window Filmsken Your Windows, Block Some Light from Passing Through, and Provide Privacy. for Those Who Need Daytime Sleep. Provide a Safe for You and Your Family. Protect Your Privacy and Enhance Security. Material: Portable Pleated Roller Blinds Are Made of Light-Blocking and Heat-Insulating Fabric, Encrypted Polyester Fabric + Reflective Aluminum Foil, the Fabric is Waterproof, Can Block and Reduce External Heat and Noise, Protecting Your Indoorniture from Direct Sunlight. It Can Be Used As a Privacy Screen. Wide Applications: This Curtain Can Be Used in Car Windows, Bedrooms, Living Rooms, Offices, Kitchens, Bathrooms and Other Glass or Smooth Surfaces. It Can Be Installed Anywhere That Needs to Be Shaded from the Sun. Easy Installation: the Blackout Window Cover Can Be Easily Installed and Removed Without Drilling Holes, Using Suction Cups to Cause Any to the Window or Wall. This Portable Blind is Also Suitable for Travel and Car Shade. They attach directly to the glass, and the suction cups can be installed in minutes without damaging the window or the wall.