It has a larger interior space of 1 cm than other large masks, so even if there is a lot of facial movement, there is no inconvenience because it does not touch the face.
The triple structure also provides better ventilation than conventional quad masks, making breathing comfortable. However, fine dust and powder blockability do not decrease.
Savewon Bio KF94 Mask - Korean First Class Surgical Particulate Respirator
Up to 300 million per month (MOQ: 1 million per month x 6 months)