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