Kore Executive Hi-Rise Adjustable Chair, Black Leather-Like Seat, Adjustable 21-32" GREAT FOR THE OFFICE - Gently rounded ergonomic base allows you to move and flex without leaving your seat STAY ACTIVE - Exercises legs, back, and abdominal muscles while you "actively sit" SOOTHING - Relieves soreness and stiffness and allows mobility while you sit FITS A VARIETY OF USERS - Adjustable seat height from 22" to 31" making it a great addition to a standing desk GREAT OFFICE GIFT - Improves productivity, decreases back pain, while helping you stay focused for longer periods of time thanks to "active-sitting" The Ultimate active sitting stool! Rock, swivel, move &amp; burn calories while sitting. Exercises legs, back and abdominal muscles which will help relieve soreness and stiffness. Counter-balanced stable base safely moves with you &amp; rests naturally upright so you can sit normally without rocking or balancing. Rubberized coating is non-skid, non-scratch &amp; grips most surfaces. Use your Office Wobble Chair anywhere, including occupations that requires prolonged sitting such as: Medical / Pharmaceutical professionals; Lab Technicians; Office and Factory; Education; Retail; Entertainment; or Customer support. The perfectperching seat for the Standing Desk!Gently perch on the stool allowing movement and mobility throughout the day. The Office Executive is designed as a leaning or standing stool to keep people active when they are sitting, strengthening the bodys core and legs, improving posture and keeping you from getting bored! Gently rounded ergonomic base allows you to move and flex while seated which can increase comfort and productivity.