The DPM-10 from Hot Shield is a replacement filter for the Hot Shield HS-2 Wildland Face Mask. It is an N-95 particulate filter that is low level and NIOSH certified. This replacement N-95 filter features steam activated carbon media sandwiched by a cotton material with an exhalation valve & non-adjustable rubber straps. The filter does not block fire gases, including carbon monoxide. Filters are sold individually but there are 10 filters per box.