The Disposable Face Mask is made with 3 ply extra soft microfiber material which makes this half face mask comfortable and provides excellent breathability, the 3 ply face mask has high filtration capacity which keeps your face, mouth covered and protected from germs, chemicals, dust particles, fluids, etc. These face masks feature comfortable elastic ear loops which enable to use them for a long period, the built-in nose piece molds itself to the face design to ensure a perfect fit for men and women The face mask comes with a smart pulls dispenser box which makes it convenient to pull up a mask and re-pack the box back to preserve other masks in good condition These face masks have> 99% bacteria filtration efficiency ASTM Face Mask Performance Level Selecting the appropriate mask for a particular procedure is a critical component of your Personal Protective Equipment (PFE > 99 ) protocol. Although may look similar, each mask has notable differences affecting the performance and level of fluid resistance and particle filtration. Understanding the ASTM performance level of each face mask can help make the selection process easier and ensure your mask will provide appropriate protection to minimize the spread of potentially infectious diseases. ASTM F2100-11 Standards: ASTM Level 1 Mask | ASTM Level 2 Mask | ASTM Level 3 Mask