Filter to be attached around user&#39;s waist for purifying air in a supplied air breathing system for use in otherwise hazardous environments
FIG. 1 is a front elevation view of a filter to be attached around user&#39;s waist for purifying air in a supplied air breathing system for use in otherwise hazardous environment showing my new design; 
     FIG. 2 is a rear elevation view thereof; 
     FIG. 3 is a right side elevation view thereof; 
     FIG. 4 is a left side elevation view thereof; 
     FIG. 5 is a top plan view thereof; and, 
     FIG. 6 is a bottom plan view thereof.