TOP KOREAN BLACK KF94 MASK: The KF94 mask filters out most airborne particles, protecting users from breathing in tiny particles down to 0.4um in diameter. KF94 offers significant protection over normal blue 4 ply masks. CERTIFIED KOREAN KF94 MASKS: This kf94 mask is made with high quality MB fabric that is effective in preventing airborne particles and allergens. Made with a triple-layered electrostatic filtration system, this product will filter at least 94 percent of PM2.5 airborne particles to protect the wearer from exposure to harmful air pollutants. EASY BREATHING : MH Care KF94 certified masks fit securely on your face so that you can breath easily and keep the mask on all day without discomfort.  COMFORTABLE MASK DESIGN: 3D Tri-folding Stereoscopic Design: Our mask covers not only the respiratory system but also the chin and maintains cleanliness as foundation, lipstick, etc. come in less contact to the mask. KFDA: MH CARE safety masks are manufactured in South Korea. The masks are KFDA approved.