An adhesively backed strip of {HEAD ~ foam} or sponge rubber is adapted to be removably secured within {TAIL ~ the upper peripheral edge} of a conventional oxygen mask used to deliver oxygen to a patient 
An adhesively backed strip of { HEAD ~ foam } or sponge rubber is adapted to be removably secured within { TAIL ~ the upper peripheral edge } of a conventional oxygen mask used to deliver oxygen to a patient
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH