Privacy filter is designed to protect your MacBook Pro 13 and the information on your screen. Patented microlouver technology darkens on-screen data from a side view. Screen data is visible only to persons directly in front of the monitor. They see clearly without blurring or distortion. Filter also protects LCD screens from scratches and damage as well as dust and dirt. Easily attach and remove the privacy filter. Application adhesive is specially formulated for display screens. Notebook filter can remain in place when computer is closed. Filter is reversible with the anti-glare surface on one side.