How does seat depth adjustment work on an ergonomic chair?

Seat depth adjustment (seat slider) moves the seat pan forward or backward — typically 2"–4" of travel — allowing users of different thigh lengths to maintain the correct 2"–4" gap between the front seat edge and the back of the knees while using full backrest support. Without this adjustment, short users either lose back support or have the front edge cut into the back of their knees. At OfficeFurniture2go.com, all ergonomic chair specs note whether seat depth adjustment is included — call 1-800-460-0858.