A respirator comprising: a main body adapted to cover the mouth and nose of a user of the respirator; a first fastening component attached to a first side of the main body wherein the first fastening component comprises a first exhalation vent; a second fastening component attached to a second opposing side of the main body, wherein the second fastening component comprises a second exhalation vent; and a first pull-strap fastening component and a second pull-strap fastening component, the first pull-strap fastening component being formed integrally with the first fastening component attached to the main body and the second pull-strap fastening component being formed integrally with the second fastening component attached to the main body; and a strap attached to the first pull-strap fastening component and the second pull-strap fastening component; wherein each of the first pull-strap and the second pull-strap fastening components independently comprises a slot through which the strap can be inserted; wherein one of the first pull-strap fastening component and second pull-strap fastening component is an adjustment means for adjusting the fit of the respirator to the user's head, further wherein the second pull-strap fastening component is the adjustment means and the strap is capable of encircling the user's head by being looped through the slot of the first pull-strap fastening component and extending back around the user's head to the second pull-strap fastening component, characterised in that both ends of the strap are capable of being adjustably threaded through the slot of the second pull-strap fastening component. a main body adapted to cover the mouth and nose of a user of the respirator; a first fastening component attached to a first side of the main body wherein the first fastening component comprises a first exhalation vent; a second fastening component attached to a second opposing side of the main body, wherein the second fastening component comprises a second exhalation vent; and a first pull-strap fastening component and a second pull-strap fastening component, the first pull-strap fastening component being formed integrally with the first fastening component attached to the main body and the second pull-strap fastening component being formed integrally with the second fastening component attached to the main body; and a strap attached to the first pull-strap fastening component and the second pull-strap fastening component; wherein each of the first pull-strap and the second pull-strap fastening components independently comprises a slot through which the strap can be inserted; wherein one of the first pull-strap fastening component and second pull-strap fastening component is an adjustment means for adjusting the fit of the respirator to the user's head, further wherein the second pull-strap fastening component is the adjustment means and the strap is capable of encircling the user's head by being looped through the slot of the first pull-strap fastening component and extending back around the user's head to the second pull-strap fastening component, characterised in that both ends of the strap are capable of being adjustably threaded through the slot of the second pull-strap fastening component.