I pulled out shoes I haven’t worn all winter and found white fuzzy patches growing on the leather. What is this?

identifying the culprit to providing practical solutions and preventive measures, we’ve got you covered.
1. What Those White Fuzzy Patches on Your Leather Shoes Actually Are
The white fuzzy patches you’ve discovered on your leather shoes are most likely mold or mildew. Mold is a type of fungus that thrives in damp, warm environments, and it can appear as a fuzzy, white or greenish growth. Mildew is similar but usually manifests as a powdery, white coating. Both are common on leather products that have been stored improperly.
Leather, being a