Subdividable base meshes
usable dynamic subdivision feature in ZBrush
available file format - .ZBP (Insert Multi Mesh Brush - IMM Brush), FBX, OBJ
High Definition Meshes
OBJ (OBJ, filesize: 725 KB), FBX (Autodesk FBX, filesize: 1.21 MB), ZTL (Zbrush, filesize: 1.02 MB)