My Mirra chair seat ripped after 15 years - no luck working with Herman Miller dealers - no return phone calls or emails. Finally, a returned email from a dealer in another city to help me identify the model (oddly not on the HM label). They wrongly identified it as a Mirra 2. I discovered Office Logix online, easily identified my model, ordered the Mirra 2 renewed and it showed up about 10 days later. It feels and looks brand new and should last me until my late 90"s
