Park chairs are designed to withstand outdoor conditions, including moisture, which is a primary cause of mold growth. Manufacturers use weather-resistant materials such as aluminum, treated wood, or high-density polyethylene (HDPE) plastic to minimize water absorption. These materials are inherently mold-resistant or coated with protective finishes that repel moisture.

Additionally, park chairs often feature slatted or perforated designs to allow airflow, reducing dampness and preventing mold from thriving. Proper drainage holes or elevated legs further prevent water from pooling. Regular maintenance, such as cleaning with mild soap and ensuring chairs dry completely, also plays a crucial role in mold prevention. By combining durable materials, smart design, and upkeep, park chairs remain mold-free and long-lasting in outdoor environments.