M3 Face Masks, Polyethylene, One Size Fits Most, 300/CartonKimtech M3 Pouch Style Face Masks with Knitted Headbands are a smart piece of personal protective equipment (PPE) for your ISO Class 3 and higher cleanroom environment. The individually bagged masks have a low linting polyethylene film outer layer that provides protection from contamination and the soft inner facing fabric provides comfort. The pouch style masks have a large breathing chamber for added comfort, two knit headbands to help ensure a