I am selling my ergonomic working chair which Stanford EH&S and physical therapists suggested to me to buy because I have a severe lower back pain due to poor working posture. It has kept me with good working posture and I never have (more than moderate) back pain since I started using it.

I am selling it for $150; there are 4 adjustment knobs to you customize to ergonomically fit how you sit.

For more complete description, visit.

http://www.thehumansolution.com/office-master-ys72-chair.html

I live at 119 Quillen Ct, Stanford, CA 94305.

Feel free to contact me at 650-796-7475, if you are interested!