3M Privacy Filter Black, Matte, Glossy - For 11.6" Widescreen MacBook Air - 16:9 - Anti-glare - 1 Pack Privacy filter keeps confidential information private. Only persons directly in front of the monitor can see the image on screen while others on either side of it see a darkened screen. It is great for high-traffic areas such as airports, airplanes, commuter trains, coffee shops and other public places. Custom fit to your 11" Apple MacBook Air with your choice of two easy-to-use, included attachment methods. Reversible, matte side reduces glare and reflections. Lightweight, thin, frameless design protects display from dirt, debris and scratches. Clean easily with a soft cloth and water. Filter includes a convenient storage folder that keeps your privacy filter clean while not in use on your device.