{TAIL ~ The fluid cushion} has {HEAD ~ a fluid support surface}, a retractable/deployable bolster, and a closure mechanism 
{ TAIL ~ The fluid cushion } has { HEAD ~ a fluid support surface } , a retractable / deployable bolster , and a closure mechanism
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH