With the release of the Primus Winter Gas, you can use LP-gas down to –22 °C. This is thanks to the ingenious Vapour Mesh, made from absorbent paper that increases the surface for the evaporation process. Thus, Winter Gas changes from liquid to gas much faster, making it the perfect choice for sub-zero conditions. After 60 minutes of cooking, a Winter Gas cartridge is approximately 9 % more powerful than one without Vapour Mesh. After 120 minutes of use it delivers about 15 % more power.