{HEAD ~ An adjacent intermediate panel}, attached at a common narrow end to the holding fabric, may be made of {TAIL ~ a similar or heavier material} or of multiple layers as the upper panel 
{ HEAD ~ An adjacent intermediate panel } , attached at a common narrow end to the holding fabric , may be made of { TAIL ~ a similar or heavier material } or of multiple layers as the upper panel
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH