Ergonomic Height Adjustable Wobble Stool for Standing Desk (Black)

REDUCE BACK PAIN:With the SUN-FLEX@ Active chair you can intuitively stimulate your core muscles, strengthen your back and increase your blood circulation ACTIVE SITTING POSTURE:We recommend that you sit with your feet balanced on the base or on the floor. This puts your body in a posture similar to when you ride a bicycle- or a horse. The active-sitting function is made possible by the dome-shaped base, while the chair’s height provides the benefit of an increased hip angle HEIGHT-ADJUSTABLE and SWIVELABLE:Thanks to the choice of superior quality materials and simplicity of use, you simply pull the lever under the seat to adjust the height from 24.5 inch to 27.9 inch and swivel the seat 360º horizontally EASY ASSEMBLY:The seat,gas spring and base come apart for easy shipping, storage and assembly;The three parts just snap together. Assembly takes less than 1 minute and requires no tools or screws.Please remove the plastic cap over gas spring and discard before assembly DURABLE & STURDY:SUN-FLEX@ Active features an upholstery fabric seat that is durability tested to 110,000 cycles. The non-skid base securely grips most floor surfaces, including carpet, wood and tile