Instead of a cushion, rigid side portions can be provided on {TAIL ~ the leg portions} to act as {HEAD ~ a support} 
Instead of a cushion , rigid side portions can be provided on { TAIL ~ the leg portions } to act as { HEAD ~ a support }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD