This is a Zbrush model.The boot has 5 subtools: Boot, Back, Tongue, Eyelets, Laces.The boot subtool has 8 subdivisions, the other ones have from 3 to 7. When all tools are merged, the lowest subdivision is 1295 polygons and the Highest is 6414120 polygons.The images are screenshots from Zbrush.
I have also exported the lowest subdivision and the highest subdivision in OBJ and in FBX formats. The files are compressed with winrar.
OBJ (OBJ, filesize: 131 MB), ZTL (Zbrush, filesize: 47.5 MB), FBX (Autodesk FBX, filesize: 216 MB)