Bests & Worsts Reviews from Amazon

Over the course of the past year I've bought several different brands of kn95 masks. These are by far the thinnest. However the big problem is that the entire box was defective. (At least I hope they were defective and not designed that way.) The small dashed line / pressed lines on both sides (the horizontal lines you see on the mask) were burned / punched through! Each little "dash" was actually a tiny hole about one to two millimeters long. Which quite effectively negates the whole purpose of wearing a mask. I immediately threw the whole box out because I didn't want risk anyone in the house grabbing one to go out and finding out once they were out what was wrong with them.