Acorn no longer offers this product, or Zappos no longer offers it. It could be a seasonal offering. Unfortunately it frays at the edges under normal use. I called
Acorn b/c it is their fault not Zappos and they suggested I have worn them outside. they need me to pay for shipping and send them the slippers. They are not offering the slipper at this time. i suspect this new product has been a fabric fraying flop.