What is the difference between a waterfall seat edge and a rounded seat edge on an ergonomic chair?

Both reduce pressure on the underside of the thighs and behind the knees. A waterfall seat edge curves steeply downward (20°–30°) at the front — more effective pressure relief for shorter users whose feet do not fully reach the floor. A rounded seat edge has a gentler curve (10°–15°) — appropriate for taller users. Both are preferable to a flat, squared-off front seat edge for extended ergonomic seating. At OfficeFurniture2go.com, ergonomic chair specs note seat edge design — call 1-800-460-0858.