{HEAD ~ The main unit} may be placed at a distance and the air can come into the hat by {TAIL ~ a small tube} to add versatility so that the person wouldnt have to carry the unit 
{ HEAD ~ The main unit } may be placed at a distance and the air can come into the hat by { TAIL ~ a small tube } to add versatility so that the person would nt have to carry the unit
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH