Cycling helmet having air filtering and breathing means
FIG. 1 is a left side elevational view of a cycling helmet having air filtering and breathing means showing my new design; 
     FIG. 2 is a right side elevational view thereof; 
     FIG. 3 is a top plan view thereof; 
     FIG. 4 is a front elevational view thereof; 
     FIG. 5 is a rear elevational view thereof; 
     FIG. 6 is a bottom plan view thereof; and, 
     FIG. 7 is a bottom perspective view thereof, the person shown in broken lines is for illustrative purposes only and forms no part of the claimed design.