Abstract: A vibration damper for a seat suspension system is disclosed with a shock absorber which dampens seat vibrations when the shock absorber is coupled to the seat suspension system. The shock absorber includes a dampening cylinder housing with a dampening piston slidable therein. The dampening cylinder housing is coupled to one of the vehicle and seat, such as to the floor of the vehicle. An elongated latch engaging member, which may be in the form of a dampening piston rod is coupled to the dampening piston. A latch is shiftable between first and second positions. When in the first position the latch engages the dampening rod, and when in the second position the latch disengages the dampening rod. When engaged to the dampening rod, the latch couples the dampening rod to the other of the vehicle and seat so that the shock absorber applies a dampening force to the seat. Conversely, when the latch disengages the dampening rod, the shock absorber is relieved from applying a dampening force to the seat.