Wear Instructions

Disclaimer: this is an improvised PPE device for investigational use only.

Updated Instructions are Available on the User Guide Page

HMEF Filters are NOT provided by MasksOn. Healthcare providers will need to procure and attach them separately.

1. PREPARE PERSONNEL

2. PREPARE MASK

⚠️Glasses and facial hair can interrupt the seal, potentially letting unfiltered air into the mask and putting the user at risk. It is recommended to be clean-shaven and not to wear glasses when using the mask.
⚠️Used gloves can contaminate mask interior surfaces and soil the viewing window exterior. Clean gloves must be used while donning/doffing masks. Hold the mask around the mouth area of the mask so as to not contaminate or soil the viewing window area of the mask.
Visually inspect the mask, the adapter, and the filter for cracks or other signs of wear that may compromise the integrity of the seals.
- For example, check to make sure that the exhalation valves on the inside of the mask near the mouth are flat and in place. Note: this is a different component than the rectangular valve that is connected to the adapter.
Loosen both straps on the bottom of the mask as much as possible.

3. PUT ON MASK (“DONNING”)

With the straps pulled out of the way, use one hand to hold the mask from the bottom (chin) region of the mask and position the mask on the face. Make sure there is no hair in the seal.
⚠️Hair in between the face and the mask can prevent a proper seal, which may enable non-filtered air to leak in and put the user at risk.
With the other hand, pull the straps over the top of the head.
Adjust the positioning of the mask and straps while holding the mask firmly against the lower half of the face.
Tighten one strap at a time until snug, while maintaining a firm grip on the mask, pressing firmly against the lower part of the face.
Fine-tune positioning of the mask and straps with both hands.

4. USER SEAL CHECK

With a clean, gloved hand, cover the end of the filter at the top of the mask.
Breathe in to make sure the mask sticks to your face. You should feel a tight vacuum on your face when you inhale.
The tight seal ensures that all air entering the mask is passing through the filter. If the mask does not feel tight on your face, check for hair or other reasons that could be affecting the seal. If you hear air leaking or cannot create a tight vacuum, do not use the mask.

5. TAKE OFF MASK (“DOFFING”)

⚠️The face mask is the last PPE that should be removed. Remove gloves and sanitize hands before touching the mask per your hospital’s protocol. If your protocol includes wearing two sets of gloves, the recommendation is that you remove one pair of gloves, perform hand hygiene, and then continue to remove the mask with the first set of gloves in place.
Loosen the two straps on either side of the bottom of the mask (tape on exhaust valve not shown here).
Place your thumb under one of the side straps near the face mask.
Slide your thumb all the way to the back of the mask.
Use your thumb to push the straps up and over the top of your head, moving it away from your face.
The mask should end up pointing away from you.
Once the mask is removed, treat it as contaminated and follow hospital protocol for reusable items. If you do not have existing protocols, see the sanitation instructions.

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