Specification: ● High Quality - Half face cover is made of high-quality silicone, soft, comfortable, durable and safe. Once worn, it will effectively eliminate any signs of organic chemical vapor or smoke ● Adjustable Comfort Belt - which can be adjusted according to your head size, perfectly fits your head ● Face cover suitable for most face sizes (face cover size: 11.5cm*13cm (4.5in*5in)) perfectly fits your face! ●Double Protection-Our face cover adopts a double filter system, which effectively blocks 97% of the organic vapor/gas, oil fume, pollen, dust and other particles in the air. It is an ideal protection device in your work ●Wide Range of Applications-the half face cover can block a variety of harmful substances, and there are chemicals, glass, metal, paint, agriculture, formaldehyde and other irritating vapors/gases in the work area. Prevent dust particles during When to replace the filter cotton and filter box? When you feel that the breathing resistance is obviously too large, the human body will feel uncomfortable. We recommend changing the filter cotton every 2 days of use and the filter box every 10 days of use. (The service life can be extended or shortened according to the situation) Suitable for all occasions： (1) Printing job (2) Polishing work (3) Grinding work (4) Construction work (5) Paint work (6) Painting work (7) painter work (8) Metal cutting and welding Package Included: 1 x 308 Half Face Cover 2 x Replaceable Filter Boxes 2 x Plastic Covers 8 x Filters Cotton