Conformable surgical face mask

Claim 1

A generally pouch-like, flexible face mask comprising: a generally rectangular body portion formed from a air permeable filtration medium comprised of a plurality of coextensive layers of nonwoven material one of which is oversized, said body portion having top and bottom edge portions and a pair of opposed side edge portions wherein said oversized layer is folded back upon itself to receive the remaining layers within the fold formed in the oversize layer and all layers are secured within the overlap portion; means for retaining the mask on the head of a wearer; and means for conforming the face mask to the face of a wearer comprising an elastic member formed from an elastically extendable material secured to one surface along substantially the entire periphery of said bottom and side edge portions only of said body portion, said elastic member having a length in a relaxed state substantially shorter than the edge portions to which it is secured and a length in an extended state approximately equal to the edge portions to which it is attached, providing thereby a continuous, gathered, face-engaging pouch-like nose and mouth cover portion when the elastically extendable material is in a relaxed condition, said pouch-like nose and mouth cover portion adapted to conform to the lower portion of the face of a wearer and produce a substantially gas-tight seal between the mask and the face of the wearer.