While dry bread can be repurposed to make croutons or bread pudding, nobody wants a sandwich made from dry bread. But most people assume that you have no control over the dryness of your bread - and that's just not true. Back in the day, our grandmas would use another kitchen ingredient to prevent dryness, and they used to stick a stalk of celery into the bag or bread container.
The moisture within the celery will stop the bread from drying out and keep it fresh and soft for much longer than without it, but just make sure that you change the celery stick every few days.