Uses long-selling filter U2W. The high performance mask with the "RL2" section of particle capture efficiency of 95.0 % or higher in the "RL2" classification function allows you to check the tightness of the palm. Can also be used with protective glasses. Asbestos (asbestos) Work level 4 molding plate (removable as it is in original shape). Work level 2 insulation, and the enclosure of fire-retardant film (items not including crushing, cutting, puncture, and polishing). The silicone rubber face is gentle on the skin with excellent heat and cold resistance. The BT (bypass) type tightening cord is water repellent and oleophobic filter, so the ventilation resistance is almost no change even when working in areas where water splashes or oil mist, making it easy to breathe.