Class 2, Medium efficiency efficiency (94%) for medium risk hazards. Handy sized and easily pocketed these individually packed masks hygienically fold flat when not in use. Ergonomically shaped for an efficient fit. Conforms to EN149:2001+A1:2009. · · · Conforms to EN 149:2001+A1:2009 · · Class 1 efficency (80% minimum) for low risk hazards · · Handy sized and easily pocketed these individually packed masks hygienically fold flat when not in use · · Ergonomically shaped for an efficient fit · · Easy-flow exhalation valve to avoid moisture and heat build up · · Comes in a pack of 10