What is the difference between 2D Mask and 3D Mask?
There are two types of KF94 masks, the 2D style and 3D style.
The 2D style is a clam shaped mask that is folded in half. (Horizontal)
While the 3D style is a mask that has two flaps that fold out to cover the nose and chin.
It is commonly referred to as a boat shape. (Vertical)
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