Disposable three-layer masks are made of two layers of fiber non-woven fabrics that are professionally used for medical and health, and an additional layer in the middle has a filter germ of 99% or more. Plastic strip, without any metal, with vapor permeability, comfortable. Filtering effect B.F.E up to 99% The first layer is made of anti-bacterial filter paper to achieve 99% of the anti-bacterial filter, which plays a role of anti-bacteria and prevents virus harm; the second layer in the middle is made of new high-efficiency adsorption and filtering materials-activated carbon fiber and activated carbon cloth Specification: Excecutive Standard: GB/T 32610 2016 Material: 30% Blue non-woven fabric + 40% meltblown fabric + 30% white non-woven fabric Protection level: KP95 Size:17*9.5cm