The difference between direct thermal and thermal transfer is that the thermal transfer printers require a ribbon. If you're using a thermal transfer printer and would like a more durable material with an aggressive adhesive, the Weatherproof Thermal Transfer should work well for you. Please note that when using the polyester-based weatherproof material, you will need a durable wax resin ribbon. You can visit the following link to view our available ribbons, https://www.onlinelabels.com/uses/thermal-ribbons. If you need assistance with finding one compatible with your printer, please feel free to reach out to Customer Support at 888-575-2235 with the make and model of your printer. You can visit the link below to request free samples of this material for testing with your application. https://www.onlinelabels.com/samples