The middle member may comprises {HEAD ~ a composite} of {TAIL ~ alternating layers} of wire trusses and polystyrene foam 
The middle member may comprises { HEAD ~ a composite } of { TAIL ~ alternating layers } of wire trusses and polystyrene foam
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH