Patent ID: 8602501

Claim:
A backrest comprising: a shell comprising a first, forwardly facing support surface, said support surface comprising horizontally spaced opposite side regions and a central, spine region positioned between said opposite side regions, said central, spine region comprising vertically spaced upper, middle and lower portions, said upper portion of said central, spine region comprising at least a first protuberance extending forwardly from said support surface, and said lower portion of said central, spine region comprising at least a second protuberance extending forwardly from said support surface, wherein said first protuberance is positioned proximate, and extends downwardly from, a top edge of said shell; and a cushion disposed over said first support surface and comprising a top edge positioned proximate said top edge of said shell, said cushion comprising a second, forwardly facing support surface contour configured to visually disguise said first and second protuberances wherein said second support surface is substantially free of any protuberances overlapping said first and second protuberances.