A seat assembly may include a seat base and/or a seat back. The seat back may be connected to the seat base. The seat back may include a back panel having a plurality of external support members disposed in a grid configuration. The back panel may include a first portion, a second portion, and/or a third portion. The third portion may connect the second portion to the first portion. A method of assembling a seat assembly may include connecting the back panel with the seat back, and/or connecting the seat back to the seat base.