Hanging t-shirts are mapped and textured in Maxwell 2.0 format. Included is texture map in TIFF format with wireframe layer which should allow you to better edit texture to fit your needs along with jpg texture which is used in model space.
MXM material uses single sided sss. (WORKS ONLY WITH MAXWELL 2.0 and later)
Wireframe preview shown in Max format which has turbo smooth modifier applied so it is easy to scale down to lower polygon count for scene optimization. Alternatively, sssss can be eliminated from the mxm layer stack to improve rendering performance if necessary.

Available for download:

Zipped MXS file (pack n' go)(can extract mxm from mxs if necessary)
Zipped MXM
Zipped OBJ file with .mtl
Zipped Maps (layered uvw wireframe TIFF included)
Max 2009 file with assigned mxm's (must redirect asset paths to downloaded maps folder. HDRI used in scene not available)