Explainer
S Track vs L Track vs SL Track
The track is the rail the rollers travel along. Its shape decides how much of your body the rollers can actually reach.
By ChairMentor Editorial Team · Research and editorial standards
Last reviewed 2026-08-22
Researched from published manufacturer specifications and retailer documentation. Not a hands-on test. How we research.
S track
An S track follows the natural curve of the spine from the neck to the lower back, then stops. It keeps the rollers in contact with the spine's curvature but leaves the glutes and hamstrings untouched.
L track
An L track continues past the lower back and under the seat, extending coverage to the glutes and upper hamstrings. Track lengths are typically quoted in inches.
SL track
An SL track combines both: the spinal curve of an S track plus the seat extension of an L track. It is the most common configuration in premium chairs.
Update log
This page is re-checked at least every six months, and sooner when a price, warranty term or specification changes.
- 2026-08-22Page reviewed against current manufacturer and retailer documentation.