3M™ PFMA11 Laptop Privacy Filter for the Apple® MacBook Air® 11-inch. The filter allows you to work privately in public places. 3M™ privacy technology darkens on-screen data when viewed from the side, and provides higher clarity than competitive filters. The filter application system features an optically clear adhesive designed specifically for display screens. Testing proves that, when kept clean, the filter can be repositioned hundreds of times.