Klein Tools Reusable Face Masks use these replaceable filters to offer basic protection against non-toxic dust, pollen, mold, dander, and common airborne irritants. Washable mask features nose clip for fit and glasses fogging prevention; comfortable hook-and-loop neck strap and secondary head strap for optimum fit. Exhalation valves for cool mask environment. Easily replaceable filters.Warnings NOT NIOSH-approved. This is NOT a medical device. NOT for use against silica, asbestos, mold, or other harmful substances. NOT for use in atmospheres immediately dangerous to life or health. Refer to user instructions and/or maintenance manuals for information on use and maintenance of this mask. Follow manufacturer's instructions for changing cartridges, canisters and/or filters. Always conduct a mask inspection prior to each use to ensure mask is in proper, usable order. Never substitute, modify, add or omit parts. Use only exact replacement parts in the configuration as specified in User Instructions. To ensure safe operations, follow the instructions. Failure to observe warnings instructions may result in sickness or death. Features Made of 5 layers of non-woven polypropylene with a folding activated carbon layer These filters are designed to fit the Klein Tools Reusable Face Mask only, and only when these items are used together is the device usable for suitable applications Folding, Activated Carbon Layer Sold as a 3-Pack Replacement Filters (Cat. No. 60443) for Klein Tools Reusable Face Mask (Cat. No. 60442) offer basic protection against non-toxic dust, pollen, mold, dander, and common airborne irritants NOT NIOSH-approved; Not for silica, asbestos, mold, or non-organic chemicals. NOT a medical device Filters are easily replaceable; twist the two valve backings to remove filter and replace Protection Type: Basic Protection Against Non-Toxic Dust, Pollen, Mold, Dander, and Common Airborne Irritants Temperature Range: 14 F to 104 F ( 10 C to 40 C) Size: Overall Length 5.6 in (14.1 cm), Overall Width 3.9 in (9.9 cm), Overall Height 0.05 in (0.1 cm), Depth 5.75 in, Width 2.125 in, Height 0.33 in Weight: 0.0800 lbs Material: 5 layers non-woven polypropylene, melt blown polypropylene, activated carbon Compatibility: Klein Tools Reusable Face Mask Cat. No. 60442 Filter Replacement Method: Twist valve backings to remove and replace Compliance: Not NIOSH approved, Not a medical device Country of Origin: China Instructions60442_Reusable Face Masks_Instructions_WR.pdf60443_Replacement Filters INSTRUCTIONS for Reusable Face Masks_WR.pdfDownloadsSpec Sheet