This product failed 9 months into use. 8 of these were ordered and really only sat in once monthly in a conference room for team meetings.  The base detaches from the seat, and becomes to wobbly to sit in. There is no way to tighten it. Neither Wayfair nor the manufacturer, SunPan, were willing to offer any repair solution or replacement because it was purchased 12 months prior. They have a 1 year warranty, regardless if the product arrives and sits in the box for 3 months without use.
It was an inexpensive chair to begin with, but these chairs are an extremely low quality product.