FDA approved Korean filter standard respiratory face mask with premium breath-ability and comfort. With a 94% filtration percentage, the 4-layer structure protects the wearer from harmful air pollutants. Adjust the mask to fit the face by pressing on the nose wire to conform with the shape of the nose. ATEX High-guard KF94 features a thick and secured ear loop, a 3-dimensional mask structure, and well-padded material.