This is the 2nd time I bought these masks; altogether I've bought 300 masks from them, and had no problem whatsoever. Very good quality compare to the other 3 brands of KF94 masks I've used because I didn't feel itchy when wearing them as oppose to the other 3 which made my nose itchy. I have allergies, so I'm more sensitive. Unfortunately, they are too big for me unless I wear an adjustment clip at the back of my head. Now only my 18 year-old son wears them in the crowded train when commuting to college. This order arrived (B.C.) less than 2 weeks which was a week faster than last time. If needed, I'll order these again.
Note: I almost ordered from " goodmannermasks.com, " but suspected they were not legit. I wish the company would call out the illegitimated sellers by name so that customers wouldn't be confused.