Mouthpiece retainer tabs

For use with a breathing apparatus, a mouthpiece comprising means defining a breathing tube having an end, flange means about said breathing tube end for insertion between the lips and the outer surfaces of the teeth of a user and a pair of teeth engageable collapsible tab means for insertion between essentially the molars of the user, said tab means being mounted on said flange means on either side of said breathing tube end, each of said tab means including means defining a central bore therein whereby upon engagement of said tab means by the teeth of a user, said tab means readily collapses and flattens to an approximate dental impression of the user, said each tab means being constructed of material having sufficient elastic memory to return to a substantially undeformed configuration after use.