EZ Well KF94 Quarantine Mask is a quality product approved by the Korean Ministry of Food and Drug Safety. In addition to this, has both FDA and CE certified Respiratory protection from harmful particulate matter such as yellow dust, fine dust, and infectious sources 1. The three-dimensional quadruple structure certified by the Korean Ministry of Food and Drug Safety securely blocks the outside (4 Layer using a melt-blown filter) 2. A fine dust mask that is comfortable to breathe because it does not touch your mouth! Excellent breathability. 3. It adheres smoothly along the face line and prevents fogging with the nose wireframe and ear wireframe. 4. It has an Excellent Mark from DermaTest in German which did not lead to toxic-irritative intolerance reactions in patch testing carried out in accordance with international guidelines