The collapsible position occupies {HEAD ~ less volumetric weight} as compared to {TAIL ~ the fully extended position} so as to reduce the volumetric weight when the backframe is in transportation and storage 
as compared to
The collapsible position occupies { HEAD ~ less volumetric weight } as compared to { TAIL ~ the fully extended position } so as to reduce the volumetric weight when the backframe is in transportation and storage
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH