FermWrap Fermentation Heater - 40W Flexible Heating MatTake control of your fermentation temperatures with the FermWrap Fermentation Heater. This 40 watt flexible heating mat is designed to wrap around your fermenter, providing gentle, even warmth to keep your yeast active in cold environments. It is ideal for maintaining the stable temperatures required for ales, Belgian styles, and kombucha. Unlike immersion heaters, the FermWrap heats the vessel wall, minimizing the risk of "hot spots" and scorching