100% Blackout Roller Shades Product Details Roller window shades are simple and generous, a perfect blend for your home or office, and make a good decoration. How to Choose Outside mount shades need to be 4-6 inches wider than the window width to ensure they cover the entire window. Choose the same size as the width of the window if your window blinds are for internal installation. Excellent Material The fabric of the roller blind can provide you with 160% blackout and block UV. It has the advantages of being waterproof and moisture-proof. The edges are smooth, without burrs, and the material is wear-resistant and not easy to fade. Safety Design The cordless function is easy to use and provides peace of mind. Gently pull down and release, and the curtain can pop back to the top with ease. Hand control allows you to pull the blackout curtain to any position. Easy to Install and Maintain Our blackout roller window shades include accessories and installation instructions for convenience. Use a damp cloth and low iron to keep it clean.