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