How to Adjust Your Vertagear SL5800 for Maximum Comfort

Quick answer

Adjust your SL5800 in five steps: set seat height, lock in lumbar support, fine-tune armrests, activate the VertaAir seat, and finalize recline tension.

SL5800 Adjustment Steps

1. 1. Set the seat height: Sit upright with feet flat on the floor. Pull the height-adjust lever under the seat and raise or lower until your thighs are parallel to the floor and knees form a 90-degree angle. Common mistake: setting height too high so feet dangle. Your feet should rest flat without pressure.
2. 2. Lock in lumbar support: Reach behind your lower back and rotate the ContourMax lumbar dial. Adjust until you feel firm support at the curve of your spine—not too high or too low. Checkpoint: the support should press into the small of your back, not your upper or mid-back.
3. 3. Adjust armrests for neutral shoulders: Press the button under each armrest to raise or lower so your elbows rest at a 90-degree angle with shoulders relaxed. Slide them inward or outward if you need to get closer to your desk. If your shoulders hunch up, the armrests are too high. If you lean sideways to reach them, they are too wide.
4. 4. Activate the VertaAir seat: The VertaAir system is built into the seat foam and does not require a switch. Simply sit centered on the cushion. The air tunnels will naturally relieve pressure on your sit bones. No adjustment needed—just ensure you sit squarely on the seat, not on the front edge.
5. 5. Fine-tune recline tension: Turn the tension knob under the seat (clockwise for firmer, counterclockwise for looser). Set it so you can lean back with moderate effort and return upright without snapping forward. Too loose and you'll feel unsupported; too tight and you won't recline. Aim for a smooth, controlled rock.

Key features of the SL5800

• SL5800: Patent pending ContourMax Lumbar contours to your back’s shape and movement, keeping you in a healthy posture. This means the lumbar support adapts as you shift, rather than forcing you into one fixed position.

  

• SL5800: VertaAir Seat features air emission tunnels to provide pressure relief for your sit bones. It reduces pressure points during long sits, helping prevent numbness and discomfort.