To achieve complete darkening, there must be no gaps for light to penetrate. With the removable self-adhesive Velcro strips around the window frame, this blackout roller blind can be attached to the window and leaves no gaps. Silver plated on one side to keep heat and light out, keeping your room dark and cool. How it works: simply attach the self-adhesive Velcro strips to hard PVC or painted wooden window frames and attach the self-adhesive adhesive strips to the silver side of the blackout fabric. Then simply press the blackout film against the fixings on the window to hang your blind. The blind is attached and can be removed and replaced daily if blackout is required. PRODUCT FEATURES This blackout fabric can be cut to the size you want, it will not fray. If you'd rather have it full size so it fits in any window, then simply fold it up or let the excess hang down when in use. Silver plated on one side for better heat and light reflection. Folds down when not in use and comes with its own storage bag. easynight is available in various sizes up to 1.45m x 3m. This blackout roller blind can be used in both directions, i.e. vertically or horizontally. Includes Easynight fabric, self-adhesive frame attachments with Velcro and self-adhesive fabric fixing strips that you attach to the fabric to match the fixings on the window. Includes instructions [possibly [English language not guaranteed].