Do you know how to distinguish the front and back of disposable masks of the same color?

Editor：Zhejiang Antipollution Medical Equipment Co., Ltd. │ Release Time：2022-09-08
1. Whether the mask has a LOGO, the LOGO is correctly written facing outward, usually in the upper right corner (looking at the FFP2 Mask);
2. The metal strip is on the top, there is no doubt about it, depending on the number of layers of the metal strip, the single layer faces outward, and the double layer faces inward (the metal strip can be clearly seen on this side of the single layer, and the small number of layers also causes bulges. The reason, but the description only writes the bulge, I personally think it is not intuitive and rigorous), from the wearing experience
It is also in line; don't judge by the direction of the thread or the fold, each family is different, as shown in the figure below: the direction of the thread and the fold of the two-color mask is also different.
KN95 Mask

Comfortable & Breathable: The KN95 face mask use skin-friendly non-woven fabric, no irritation to your skin, High-elastic ear loops and adjustable nose clip to ensure a comfortable fit and no strain of ears. It's lightweight and foldable, can cover mouth, nose and chin easily. Creates a tight seal & stops glasses from fogging.
Multi-Layer Filtration: This KN95 mask is made of a 5-layer filtration system of non-woven breathable fibers and is utilized globally, offers more protection than a standard disposable 3-Ply mask. It has tested well filtration of particles 0.3 µm or larger, greatly keeping you from dust, PM 2.5, haze, smoke, automobile exhaust, etc.
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