This is a simple but ingenious sleeve that provides two vital functions.
The first is that it will stop your stove from freezing up. When this happens, it's usually the time that you don't want it to. Having ready access to a stove that functions properly in freezing conditions, while fishing, is vital to the angler's comfort.
The second is that, due to its padded construction, it protects your stove from knocks and dents. This not only prolongs the life of your stove, but it ensures that you will have a stove that works, when you need it.