Enjoy quality sleep when you need it most. This blackout panel will transform your bedroom into a serene, dark space, allowing you to enjoy a nap or night's sleep without daylight interuption. Easily install on any smooth surface thanks to the adhesive grommet hooks—no drilling required. The pannel can be situation vertically or horizontally to accomodate just about any window. The quadruple-coated blackout fabric also blocks varying outdoor temperatures, helping to keep your room cool in summer and warm during winter months.