3M PF380W2B ™ Privacy Filter for 38in Monitor, 21:9,

3M™ Privacy Filters provide world-class black out privacy from side views outside the 60-degree viewing angle, while creating an excellent viewing experience from straight on views. Reversible between a glossy side and a glare-reducing matte side that helps reduce reflections and hide fingerprints, so you can enjoy pristine image clarity.