To achieve complete blackout, there must be no gaps where light could enter. Our patented design ensures that your blind is slightly bigger than the window frame so there is a small excess of fabric on each of the four edges. This sits against the window recess or surround, and blocks light at the edges, giving you better blackout than standard blinds and curtains. Using self-adhesive attachments on the window frame, and/or suction cups on the glass in the Portable version, your easynight blind attaches to the window and leaves no gaps. Easy to use - attach and open or remove your blackout blind whenever required. Folds up for storage. Includes fasteners suitable for upvc window frames and painted wooden frames.