3M - Particulate Respirator - 10 Count - 8511. 3M Particulate Respirator 8511, N95, is a disposable respirator that is designed to help provide reliable respiratory protection of at least 95 percent filtration efficiency against certain non oil-based particles. The respirator incorporates 3M's proprietary technology with an advanced electrostatically charged microfiber filter designed for ease of breathing.. The 8511 is fitted with a 3M Cool Flow Valve, designed to increase exhalation breathing comfort. The 3M Cool Flow Valve helps direct exhaled air downward and allows for easy breathing. When you work in physically demanding environments, a little more exhalation breathing comfort can help make a difference.. Features:. 10 Count