Feature●FILTRATION AND BREATHABILITY: Oakleys MSK3 3 Pack Replacement Filter is a high performance disposable filter which has an over 95% filtration efficiency of particles down to size of PM 0.3. Low breathing resistance also provides excellent protection and comfort●DISCLAIMER: Oakley MSK3 is not certified by NIOSH/CDC/NPPTL, is not certified to EN 149 Standards, and is not certified for workplaces where an OSHA Compliant respiratory protection program to include Fit Testing on each individual is required. It is not a medical device and it is not a personal protective equipment and does not provide antimicrobial or antiviral protection and has not been tested or qualified to prevent or reduce infections.●COMPATIBILITY: Oakley’s MSK3 replacement filter comes with three filters and is compatible with Oakley’s MSK3 Face Mask.●VISIT THE OAKLEY BRAND SHOP: Click on the Oakley logo above to view the entire Oakley brand assortment.●Made in the USADescription From the very start Oakley has been committed to providing professional and everyday athletes around the world with solutions to support their performance passions and day-to-day activities. The MSK3 Replacement Filter is a high-performance, disposable filter which has over 95% filtration efficiency of particles down to size of 0.3 microns and comes in a pack of three.