This unit will have a fan to force air into the hat so that {TAIL ~ the person} would not need to use energy to suction {HEAD ~ the air} 
This unit will have a fan to force air into the hat so that { TAIL ~ the person } would not need to use energy to suction { HEAD ~ the air }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD