3M™ Personal Safety Division N95 Particulate Welding & Metal Pouring Respirators Disposable respirator features electrostatically charged microfibers designed for ease of breathing. Protective layers of welding web are flame . Cool Flow™ exhalation valve reduces heat build up to keep the wearer more comfortable. Cake-resistance carbon filter material provides longer respirator life. Two straps provide a custom and secure fit Pack of 10