Purchased 5.10 MTB shoes for my wife. They did not fit, so I returned them, unworn and within their allotted return timeframe. They sent them back to me saying they were not re-sellable but with no specifics as to why. I used their instant refund and bought a different pair of shoes at the time I did the paperwork. Now, I am going to sell the shoes they say are unsellable and return the shoes I bought from them. They can suck it, and pay shipping. Screw you Sierra!