The Dynamic has a weight knob at the front, under the seat. After loosening this knob you can shift it up (for a lighter setting) or down (for a heavier setting).
“During my twenty-year practice as a dental hygienist, I searched in vain for a comfortable stool. I've tried them all, but continued to suffer in agony day after day year after year. Your stool is brilliant....it's the answer.”
Christy Baumgartner
Dental Hygienist/Orofacial Myologist
BQ Ergonomics LLC
11888 West 91st Street
Overland park, KS 66214
Office: 877.938.9034