This breathing half mask has two double-side intake filters, each double-side intake filter box has two filters, there is a special structure between the two filters. The air can pass through the upper and lower parts of the dual inlet filter cartridge, through this particular construction. This will increase the filtered dust volume and achieve the purpose of enhancing the filter effect resistance of the mask. This is also the innovation of our half mask. Compared with the traditional mask, the inspiratory resistance is only one fourth of the normal mask. Its filtering effect is above the KN95(Chinese standard) level. The mask will filter four times more dust but also last four times longer. This is suitable for use in a labor intensive environment, and it can effectively reduce the incidence of pneumoconiosis, let the worker feel not suffocated when wearing the face mask and add comfort. We have applied for the patent in China.

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