Mask

A mask comprising:

• a filter portion that is formed of a breathable sheet material to be wearable on a face to cover at least a nose and a mouth of the face;
• a face-contacting body that is formed of an elastic material, joined to the filter portion, and is configured to come in contact with at least a vicinity of the nose and a vicinity of the mouth of the face;
• and
• a hook strap to be looped around either a head or an ear so that the filter portion and the face-contacting body are wearable on the face,
• wherein,
• at least a part of the face-contacting body is provided with a pair of projecting pieces, each projecting piece of the pair of projecting pieces protruding downward from an upper side of the face-contacting body,
• each projecting piece of the pair of projecting pieces provided with a bending portion, and each projecting piece of the projecting pieces bendable outward toward the filter portion from an inner side corresponding to a face side, with the bending portion serving as a boundary, so as to form a pair of protrusion portions arranged on at least a part of the face-contacting body,
• the pair of protrusion portions configured to when the mask is worn on the face to respectively contact regions adjacent to both sides of the nose and to press outward the filter portion located on one side of the nose and a projecting piece of the pair of projecting pieces located on other side of the nose, while also pressing the face-contacting body toward the face, so that the pair of protrusions form a three-dimensional shape allowing the filter portion to be pressed outward into a three-dimensional shape and to conform to unevenness of the face and allowing the face-contacting body to closely contact the face.