Why is seat depth adjustment so important on an ergonomic chair?

Seat depth is the most frequently underspecified ergonomic chair feature at OfficeFurniture2go.com. Without proper seat depth, lumbar support is inaccessible — the user sits at the seat edge, defeating the purpose of the lumbar adjustment entirely. We specify minimum seat depth range (maximum minus minimum of at least 2 inches) on every commercial ergonomic chair. This single specification prevents the most common ergonomic chair complaint: 'I adjust the lumbar but it doesn't touch my back.' Call 1-800-460-0858.