Seeing how expensive quality leather is these days, no one wants to find mold growing on their leather items or even smell a mildew or musty odor on them.
LEARN HOW TO REMOVE MOLD FROM LEATHER THE EASY WAY...
Dry the leather outside, but out of direct sunlight.
Wipe with a damp cotton cloth and allow to dry.
Wipe it again with a soft cotton cloth soaked in EC3 Laundry Additive and let dry again.
Store leather at room temperature and keep humidity low.