Bread Storage, Explained
Often, bread that gets binned was never mouldy. It just went hard before anyone got to the end of it.
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You buy a good loaf. You mean to finish it. Most of it gets eaten, and then there is the last bit, which by midweek is only good for toast, and by the weekend is not good for that either.

Every slice you cut leaves a fresh cut face open to the air, and a cut face dries within hours.
So the end of the loaf is not worse bread. It is the bread that sat longest in the wrong conditions.
Sealed in plastic, a loaf sweats and goes mouldy. Left in paper or open to the air, it dries and goes hard. Either way, the last bit is the casualty.
On a woven cotton bag it does the same job for a loaf. The cotton breathes; the beeswax lining slows the rate moisture leaves. The inside keeps enough moisture to stay soft, and the crust stays dry enough that it is far less likely to go leathery or grow mould.
It will not keep a loaf sandwich-soft forever, and it would be dishonest to say it does. What most people find is that the last bit is still good bread, good enough to eat rather than bin it.
One honest note. It works best on a whole loaf you slice as you go. Pre-sliced bread has far more cut surface exposed, and it dries faster whatever you keep it in.

Try it on your next loaf. If it doesn't keep your bread better than what you do now, send it back.

