.......This is old news. It is an artifact manufactured from a bear's hind leg. It is probably a Mountaineering boot made from the skin peeled from
the leg of a bear, perhaps with a human foot still in it.
I have links to extensive discussion on this on this page of my website:
mysteries of the worm- yeti
mountaineering boot
Not everyone likes the "boot" theory, but most informed opinions agree it is certainly from a bear.