To achieve complete blackout, there must be no gaps where light could enter. Using VELCRO Brand removable self-adhesive strips around the window frame, this blackout blind attaches to the window and leaves no gaps. Silvered on one side to reflect both heat and light away, helping to keep your room dark and cooler! HOW IT WORKS: Simply apply the VELCRO Brand removable self-adhesive strips to upvc or painted wooden window frames, and apply the self-adhesive Fabric Fastener strips to the silver side of the blackout fabric to correspond. Then simply press the blackout sheet against the attachments on the window to hang your blind. The blind can be removed and replaced daily, as and when blackout is required. FEATURES: This blackout fabric can be cut to size if you wish, it doesn't fray. Silver on one side for better heat and light reflection. Folds up when not in use and supplied with its own storage bag. Easynight is available in a range of sizes up to 1.45m x 3m and can be used either way around, ie vertically to horizontally.