Importance

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Abstract

shows, a filter part, which comprises single or multi layered filter material and provides a rectangular section at the center when folded in two along the center line, is provided; triangular filter parts, each having the major side of the rectangular filter part as the bottom side, are formed in an integrated manner in the longitudinal direction of the rectangle, and tightening strings are attached to the respective minor sides of the rectangular filter part. A mask comprising a mask main body which has the center line matching the nosal bridge and is provided with cover sheets being positioned in the right and left sides thereof and covering around the nose, mouth and jaw, and tightening strings attached to the side edges of the right and left cover sheets respectively, characterized in that a stretchable rubber string is attached to the tope edges of the right and left cover sheets nearly orthogonally to the nosal bridge line. This mask can be discarded without separating and the pressing force thereof to the vicinity of the nose never weakens with the passage of time.

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First Claim