BrewSnug10/12.5BrewSnug10 12. 5. The BrewSnug10 12. 5 is a neoprene fitted jacket with built in temperature controller and heating band designed specifically for the BrewKeg10 12. 5. A thermostat probe attaches directly to the sediment bottle to read the temperature where it matters most. As a stand alone heating device, the BrewSnug10 12. 5 allows brewers to maintain a minimum brewing temperature for fermentation without the need to tie up a beer serving fridge for