This is a 3D mask that is easy to breathe. The earband is soft and strong, so it doesn't hurt to wear for a long time. It does not cause lint and can be worn on sensitive skin. It protects against viruses with a quadruple structure mask and does not wrinkle even after wearing it for a long time. The KF94 mask, approved by the Ministry of Food and Drug Safety, is also suitable for medical staff to use.