A personal respiratory protection device includes a multi-layered
structure and first and second means for attaching a headband to hold the
device in position on a wearer's face. The multilayered structure
includes a filter medium and is divided into a flat upper panel having an
upper peripheral edge, a flat non-rectangular central panel and a lower
panel having a lower peripheral edge. The central panel is separated from
each of the upper and lower panels by first and second lines of
demarcation. The first and second lines of demarcation converge towards
the first and second means for attaching a headband. The multi-layered
structure is capable of being folded at the respective lines of
demarcation so that the device can be folded flat for storage and can be
opened to form a cup-shaped off the face air chamber over the nose and
mouth of the wearer while the upper peripheral edge and the lower
peripheral edge contact the wearer's face when the device is in use.