Wider unfolding width to provide more protective space; Better quality nose strips to provide a better fit experience; Meet the requirements of YY 0469-2011, and the machine name is more assured; High efficiency meltblown filtration, high filtration and low resistance; Block the penetration of liquid, effectively reduce droplets and other contact with the mouth and nose; Three layers of high-quality non-woven fabric, soft and skin-friendly, comfortable to wear; Medical sterilization bag packaging, can be sterilized by themselves; Blue non-sterile hanging ear type, disposable;