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