Chair assembly with upholstery covering

A seating arrangement, comprising:

• a substantially rigid back frame;
• an integral back shell including a front surface and a rear surface opposite the front surface, a plurality of laterally-extending slots that extend between the front surface and the rear surface and that cooperate to define a plurality of laterally-extending ribs therebetween in a lumbar area of the back rest, wherein a pair of laterally-extending ribs of the plurality of laterally-extending ribs are connected to one another via a vertically-extending rib, wherein the lumbar area of the back shell is more flexible than a portion of the back shell located above the lumbar area and a portion of the back shell located below the lumbar area of the back shell, and wherein the back shell is coupled to the back frame at two spaced-apart positions located above the lumbar area of back shell;
• a base extending downwardly from the back assembly;
• and
• a seat assembly operably coupled to the base and configured to support a seated user.

A seating arrangement, comprising:

• a base;
• a seat assembly operably coupled to the base and configured to support a seated user;
• and
• a back assembly moveable between an upright position and a reclined position, the back assembly comprising:
• a substantially rigid back frame extending upward from the seat assembly;
• and a back shell including a front surface and a rear surface opposite the front surface, a plurality of laterally-extending slots that extend between the front surface and the rear surface and that cooperate to define laterally extending first, second and third laterally-extending ribs, wherein the first and second laterally-extending ribs are coupled to one another at a first location along a length thereof, wherein a distance between the first and second laterally-extending ribs remains relatively constant substantially proximate the first location and a distance between the second and third laterally-extending ribs changes substantially proximate the first location as the back assembly is moved between the upright and reclined positions, and wherein the back shell is coupled to the back frame at a location above the plurality of laterally-extending slots.