Fermzilla 27L / 60L all rounder Fermentation JacketThis jacket is designed to insulate your FermZilla during the colder months to keep your fermentation at the optimun temperature. It can also be used with a heating belt wrap to warm up the wort if the heat from the fermentation isn't enough. This jacket is designed to fit either the 27L Fermzilla (gen2 or 3) and the 60L all rounder fermzilla. Also completely blocks any light UV to prevent light stuck beer. This is ideal if you aren't planning to use