Are you troubled by the lack of protection for woodworking, welding, painting and staining decks..? Then you need this face cover for work. Our cover is very comfortable to wear while working, the strap creates a great seal, and all filters are sealed. Comfortable face cover for long periods of use, easy to clean, lightweight to store in your work bag. Does an awesome job keeping the fumes out.. Specification: ?Filter type: Organic vapor/gas and dust particles ?Facepiece type: half-face (reusable) ?Primary material: thermoplastic elastomer (TPE) ?Size: one size fits all Package Included: 1 x Half Face Cover 1 x Safety Goggles 2 x Replaceable Filter Boxes 2 x Plastic Covers 8 x Filters Cotton When to Change the Filter Cotton? When you feel that the breathing resistance is obviously too large, the human body feels uncomfortable, or the filter dust is dirty or damaged, the filter cotton needs to be replaced. The filter cotton is usually replaced in about 5 days (you can extend or shorten the service life according to your environment)