The insert can include {HEAD ~ a detachable cover} for {TAIL ~ the back and seat portions} alone or for the back, seat and leg portions of the body 
for
The insert can include { HEAD ~ a detachable cover } for { TAIL ~ the back and seat portions } alone or for the back , seat and leg portions of the body
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH