Just as our grandmothers and great-grandmothers wrapped their freshly baked bread in dishtowels, store your fresh bread in a linen bag.
The texture stays closer to fresh baked. And while the shelf-life isn't prolonged, that won't matter; the bread won't last that long!
Convenient to take along to the bakery/market/store so you can refuse the plastic!
100% linen in shades of white/off-white/ivory (depending on availability). Machine wash and dry.