I wear a size 8 hat and am 1.70 m tall. In the active mask, this filter did not seal the bridge of the nose, eyes, and chin. Myself and two people who examined an active mask with these filters while I was wearing it felt air escaping in these areas as I gently exhaled. When exploring with my pinky, I didn't feel any resistance between the TPU gasket material and the skin when inserting my finger into these areas. I'm rating this 2 instead of 1 because I haven't tested the filter in the standard mask - it might fit differently, I don't know as I don't have that mask. I know this mask looks like a giant dog face from the active mask side. Each of the three of us had this idea before any of us expressed it to others. My wife is Asian, 5ft 2in, 110lbs. This filter in the active mask went into her eyes, the bridge of the nose touched her forehead, and the bridge of the nose and the filter hung under her chin without touching it in any way so as not to seal anything. Maybe if you have a giant head and don't mind wearing a giant dog muzzle to control your Hannibal Lecter urges, this might be perfect for you.
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