Ergonomic Side Chair . Yes, that is also extremely important to avoid strains and other msds. Hard floor chair mats will have a grippy flat surface or sometimes small rounded spikes on the bottom of the mat. Office Desk Chairs Sashi Ergonomic Task Chair from www.cubicles.com $1249) get the ergomeister faez8erg ergonomic office chair. Adjustable seat height, armrests, seat depth, tilt, tilt tension, and lumbar support | mesh back, foam seat | 300 pounds | no headrest. Its steel frame molded by injecting polyurethane foam and curved seat and.