The outbreak of a new type of 2019-nCov has made masks a very important protection tool for us. Many people think that the front and back of a mask doesn't matter, as long as you wear it, it will be effective. In fact, this is not the case. Because the functions of the front and back of our mask are different.

Take the disposable medical mask produced by KIEYYUEL as an example, with a three-layer design.The blue outer layer is a waterproof non-woven fabric, the middle layer is a meltblown cloth with a virus filtering effect, and the innermost layer is a skin-friendly water-absorbing layer.If we wear it backwards, the protection effect will not be achieved.

How to judge the front and back of the mask?

First, we distinguish the up and down direction of the mask. The metal strip is on the top because the metal strip is used to fit the nose and tightly protect it.

Secondly, the easiest way to distinguish the front and back is to look at the color. Blue, pink, and printed designs are all fronts, and the lighter colors and white are the backs. If it is a pure white mask, it is more difficult to judge with this method, and you need to use other methods to judge.

(KIEYYUEL,Disposable medical mask)

Secondly, judging by the folds of the mask, the side with the crease downward is the front side, and the side with the crease upward is the reverse side. This design allows us to present a convex curved surface when we wear a mask, which perfectly wraps our face.

Finally, rely on the material to judge. Because the front is a waterproof layer, it will be tougher, and most masks will look like a grid.The opposite is the skin-friendly layer, which will be softer.If you still can’t judge, you can do a simple experiment: use clean, pure water to drop a drop of water on both sides. On the front side, the water droplets will roll in a ball, while the back side will gradually invade the surface.

Have you learned it?