These roller blinds block out the outside heat and keep room temperature cool in summer. Blinds block harmful UV rays and reduce glare so you no longer have to be disturbed by bright sunlight. These blinds are made of PVC material with a scratch resistant layer. Privacy blinds are water and oil resistant and are suitable for installation in office windows in living kitchens. Blinds fit any size window and can be placed at any height from the window top, bottom or middle to provide optimal sun and privacy as needed. Retractable blinds can be taken anywhere, and lightweight door blinds with sturdy suction cups can be easily attached to the window. Our blinds are held in place by suction cups and can be attached directly to the glass (no drilling required) without messy stickers or glue that can damage the window. It only takes a few minutes to attach the suction cups to the window. This window protector can be used on glass or smooth surfaces such as car windows, bedrooms, offices, kitchens, bathrooms, etc. It can be installed anywhere you need to block the sunlight to block most of the light and UV rays and protect your interior from direct sunlight. Read Less