| 摘要 |
The invention is to provide an elastic nonwoven mask comprised of a butterfly folded filtration portion, two integrated loops, and a folding ridge with identical upper and lower fold curve being symmetrical to the central point of the folding ridge. The filtration portion includes at least one layer of elastic nonwoven fabric, and the integrated loops are extended from the filtration portion on two ends. The upper and lower sides of mask are identical for the convenience of fitting onto the wearers' nose-line without the necessity of distinguishing the upper curve for nose and the lower curve for chin.
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