KF, short for Korea Filter, is the standard for face masks specified by the Korea national health insurance authority. A number of well-known Korean professional doctors and public media have issued the latest information: KF80 mask is sufficient to prevent the virus and can be worn well. [6 COMPLEX SOLUTION] UV Protection Antibacterial Deodorization Fast Drying Reusable V Fitting [MATERIAL] ATB-UV+/Spandex [SIZE] Small: 295*95 mm Medium: 300*100 mm [Additional Filter] KF80 masks are equivalent to P1 filtration and filter out 80% of particulate matter [LeMASKA Mask Washing Guide] 1)Do not wash in high temperature: Washing in hot water can damage the fabric. We recommend hand wash in cold water. 2)Caution when drying : Avoid direct sunlight. Dry in the shade. 3)Do not iron : High temperature ironing might cause damage on fabric. 4)Do not bleach : Avoid chlorine bleach and use neutral detergent. - Depending on the product, lint may be caused by excessive friction. - If the mask becomes damaged, contaminated, or difficult to breathe, replace it with a new one. - Avoid fire. - Do not use anything other than the intended use of the product. [Notification] 1)We sanitize the every package before sending. 2)We export the mask legally.