High Efficiency MERV13 2-PLY FILTER for CLOTH MASKS - 3 Pack

High Efficiency MERV13 2-PLY FILTER  for CLOTH MASKS - 3 Pack High-efficiency filters add an extra important layer of protection to fabric face masks. This high-efficiency Merv-13 material blocks up to 90% of particles 0.3 to 1.0 microns and effectively filters out pollen, bacteria, mold & spores, sneeze nuclei, pet dander, dust lint, carpet fibers, Tobacco smoke, copier toner, etc.   Made of TWO sewn layers for even more protection.  Size: 3 x 5" making them compatible with most cloth masks with pockets.  May be hand washed/air dried up to two times. Sold in packs of 3 filters.   Ships within 24hours. Warehoused in California.