3M Privacy Filters keep confidential information private. Only persons directly in front of the monitor can see the image on screen; others on either side of them see a darkened screen. Custom fit to your Apple MacBook Air 13-inch. Includes your choice of two easy-to-use attachment methods. Reversible- matte side reduces glare and reflections. Lightweight- thin- frameless design. Protects display from dirt- debris and scratches. Cleans easily with a soft cloth and water. Includes a convenient storage folder that keeps your privacy filter clean while not in use on your device. Great for high traffic areas such as airports- airplanes- commuter trains- coffee shops and other public places.