Offering excellent comfort and durability, this Sundstrm SR 100 half-face respirator mask is manufactured from a soft and flexible silicone material. It features twin exhalation valves which help to reduce breathing resistance and further enhance working Comfort. It's supplied with an SR 510 P3 R particulate filter for protection against dusts, fumes and mists, but it can be easily swapped out for another filter depending on your application.