Park chairs are designed to withstand harsh outdoor conditions, including prolonged exposure to sunlight and UV radiation. Manufacturers use several techniques to ensure UV resistance and durability.

1. UV-Resistant Materials: Many park chairs are made from high-density polyethylene (HDPE) or powder-coated metals, which naturally resist UV degradation. These materials prevent fading, cracking, and weakening over time.

2. Protective Coatings: Some chairs feature special UV-blocking coatings or additives mixed into the material during production. These coatings absorb or reflect harmful UV rays, extending the chair's lifespan.

3. Durable Construction: Reinforced frames and fade-resistant fabrics help maintain structural integrity and appearance despite constant sun exposure.

4. Design Considerations: Darker colors and textured surfaces often absorb or disperse UV rays more effectively than lighter shades.

By combining these methods, park chairs remain functional and visually appealing for years, even in sunny environments. Regular maintenance, such as cleaning and occasional re-coating, can further enhance UV protection.