Thank you for your feedback. We are sorry to hear of your disappointment. When assembling these bar stools we recommend not to tighten all of the bolts until after all is assembled and the chair is settled. This should help balance the legs. In regards to the material, as an eco-leather (aka bonded leather) product this chair features approximately 20% recycled leather, 20% Polyester/Cotton Blend, 60% Polyurethane. We take all feedback very seriously as it helps us to better our product offerings. Best Regards, Melissa, Office Star Team