Facial respiratory filter mask - has elastic loops between top and bottom corners above and below ears

摘要

The facial respiratory mask consists of a folded sheet of flexible material square or rectangular in the flat state. It is held on the face of the wearer by two elastic loops (8,9), the first joining its two top corners together and running imm immediately above the ears. The second joins the two bottom corners and fits below the ears and the occiput. The loops can be formed by lengths of elastic material whose ends are gripped in the loops at the mask corners.