Patent ID: 7152601

Claim:
A respiratory face mask comprising: a flange adapted to fit on a face of a wearer and having an inner periphery and an outer periphery, said flange being symmetrical about a longitudinal axis defining left and right halves of the mask, said flange being wider at 0°, 90° and 180° relative to a central point on the axis than in sectors extending from 40° to 60° and 110° to 130°; said flange having a wearer facing side and a garment facing side, said wearer facing side having a layer of a hydrogel adhesive having a dry initial peel strength (PDI) and a greasy initial peel strength (PGI), wherein a ratio of PDI to PGI is from 1:1 to 1.0:0.2; and an air control module carried by said flange.