I have designed a coat that I want to make out of neoprene. Has anyone worked with neoprene? Being that is a non-traditional fashion fabric it is not readily available in big-box fabric stores, has anyone bought neoprene before? I found a supplier that will ship pre-cut pieces of neoprene in various thickness’. What thickness is appropriate for a winter/fall style coat…2 mm? 3mm? 4mm?