Super sheer... but that's NOT what you want from a face mask. They are only about 2mm thick. The giveaway was the label on the plastic packing "fashion mask". Even doubled they are still inadequate and basically taking advantage of the current situation. If you washed them I reckon they'd go out of shape or fall apart. I usually read the reviews - didn't this time and have wasted the dollars as a result. The best point, they are so thin and flimsy, they are comfortable.