Honeywell North Textile Face Covers with Replaceable Filter Seamless, three-dimensional knit construction provides 4-way stretch-minimizing gaps and enhancing overall comfort. Honeywell dual layer face cover w/filter block ? 98% of 0.3-micron-sized particles (BFE) and 0.1-micron-sized particles (PFE). Adjustable ear loops and nose clip improve overall comfort and functionality of the mask for most adult face shapes and sizes. Hidden pocket designed for convenient filter removal and replacement. Contoured design stands off the face to enhance breathability Pack of 1