Pugmercs' Face mask pocket allows for exchangeable air filters for easier replacement and sanitation. Three options exist for sanitation as approved by the CDC: Heat, Bleach, and Ultraviolet irradiation.

Steps to follow when unpacking your face mask package per CDC handling instructions.

    1. Individuals should be careful not to touch their eyes, nose, and mouth when removing their face covering and wash hands immediately after removing.

    2. BEFORE WEARING MASK follow sanitizing instructions.

    3. After sanitizing the mask is yours and use accordingly.

open flame Previous research indicated Heat in sufficient quantity and duration caused other Coronavirus variants to eliminate virus effectivity. Minimum exposure duration for SARS required 30 minutes at 56 degrees C (133 degrees F). Therefore, high heat cycles on clothes drying machines for over 30 minutes allow for reusability of masks and filters. The intensity of wash/dry cycles risk felting on the filter, reducing effectiveness. The takeaway is launder cloth masks and dry on high heat for 30 minutes (min of 170 degrees F) while chemical sanitizing the filter as described below.

bleach container The CDC's page on cleaning and disinfecting households describes creating a Bleach solution for disinfecting. This can be applied to both face mask, filter, or a combination. When laundering, do not use extra soap. If washing your cotton mask, all laundry washed with it must also be dried on high heat. (170 degrees for 30 minutes minimum) Do not shake laundry washed with masks when transferring to dryer. Wash hands afterwards. The cold-water bleach solution should be used separately from washer/dryers. Remove filter from facemask before washing/drying cotton sheath. Immerse filter in cold-water bleach solution for 10 minutes, afterwards rinse with water, and allow to dry before reusing.

On March 26th, the CDC updated their list of Sars-Cov-2 disinfectants through the EPA. When searching for bleach look for "Sodium hypochlorite" in most cases. There is also a download available for the full list Here for Download. The simple takeaway though, is unless your product is listed here, keep your filter in a cold-water (room temperature is fine, just not boiling or scalding) bleach solution for 10 minutes before reusing.

Specifications for using the cold-water Bleach Solution after using facemask in the vicinity of people in public.

    1. Remove filter from face mask in preparation of bleach solution bath.

    2. Launder filter-less cloth face mask in wash with normal detergent, and dry on high heat for 30 minutes. follow safe laundering practices as mentioned above.

    3. Immerse filter in bleach solution for 10 minutes. (Less if dictated by higher concentrated solutions as listed in the EPA's commercial disinfectant list).

    4. Remove filter and rinse both sides with at least 150mL water (2/3 cups). Do not wring/squeeze filter.

    5. Let filter air dry/drip dry without wringing or squeezing then return filter to face mask or store in a dry place.

Cold-water Bleach solution can be reused for 1 week time and should remain covered when not in use. Filters last 90 days to 3 months, depending on use and bleach solution immersion times. If you would prefer calculate filter lifetime based on your frequency of contact with people, filters will last 180 bleach washes. Masks last indefinitely allowing normal cotton wear/tear.

Ultraviolet lightLast in proven sanitation methods is Ultraviolet radiation. By far the most dangerous of the three methods, UV radiation can cause skin damage in light amounts, death in high concentrations. In controlled environments, Mers coronavirus has been deactivated with Ultraviolet light. SARS coronavirus has been deactivated with 30 min of irradiation. And Nebraska medicine, featured in the NY Times is using UV dosing to extend medical equipment's longevity and sanitize rooms. Nebraska medicine outlines the many safety and control precautions required for this procedure in their Ultraviolet Germicidal Irradiation (UVGI) Process for Decontamination and Reuse pdf, outlining the Irradiance required of 300 mJ/cm^2. These findings are affirmed in Purple Sun's study on Ultraviolet light's deleterious affects on all coronavirus strains, other pathogens, and humans. Use Ultraviolet light sanitizing with extreme care as potential for harm is much higher than the first two options.