The newest addition to the DEFI Extreme line, the DEFI Extreme Soft-Flame creates a yellow soft-flame that is wind-resistant, making it easy to use outside and succeeding where most other soft-flame lighters fail.
The DEFI Extreme must be filled with S.T. Dupont's Red butane/propane mix. Using any other fuel may prevent the lighter from operating and will void the warranty.
All S.T. Dupont lighters and cutters come with a 2-year limited warranty through the manufacturer. Information on returning or repairing a S.T. Dupont lighter can be found here.