When it comes to buying blinds, you will come across many options. Among all, double roller blinds are so popular which are also referred to as zebra blinds, or night blinds . The first thing to notice about double roller blinds is that there are made from two fabrics; one for blocking out the light and another one for filtering it. The one layer of these roller blinds is usually sheer or used for light filtering as it is the first point of protection and then the blackout b