If you keep it airtight, the crust will dampen from the moisture that comes from the inside. Which storing bread that has a crust worth preserving, I tend to m

If you keep it airtight, the crust will dampen from the moisture that comes from the inside. Which storing bread that has a crust worth preserving, I tend to make sure it gets a little air (covering it with linen cloths, for example), and accept the small amount of drying out that comes with this form of storage.