In damp places, closets can easily get musty. That usually means smells, mold, rusty hardware, and soggy umbrellas left lying around. To prevent this, choose moisture-resistant materials like PVC or metals that don’t rust, such as aluminum or stainless steel. Untreated wood isn’t a great idea—it soaks up moisture too quickly. Adding vents to doors or using open hooks and racks can help air flow. Keep a small tray or stand for umbrellas so water doesn’t drip onto the floor. You can also throw in a few dehumidifying packets, charcoal bags, or a small dehumidifier to keep humidity in check. And the biggest rule—never put wet shoes or clothes back in the closet.