Sometimes the inside of the mask is swollen.
When wearing the part hits the head of the nose, mouth etc. It is very worrisome.
Even if it pushes in the swollen part, it returns to the original soon as soon as possible, so if it comes out, it will be discarded without using it.
I think the performance of the mask itself is good.
It is small because it is a cup type so human eyes are hard to care. Making is solid. On the other hand, lack of flexibility, even if trying to fit it is hard to combine strongly with its restoring power. A little leak from the side of the nose. As a cup type, feeling narrow in the mask is worrisome about steaming and breathing when wearing for a long time. Although the performance value of the filter alone is also a guide, I would like you to record well the information on the breath-esque measures fit.