For high-frequency rental business, durability and weight are the primary factors. Aluminum frames are highly recommended because they are lightweight, rust-proof, and have a high strength-to-weight ratio, making them easy to transport. Steel frames are more cost-effective but heavier and prone to rust if the powder coating is damaged. For outdoor weddings or high-end aesthetics, Resin (Polycarbonate) chairs, such as the Phoenix or Chiavari styles, offer UV resistance and waterproof properties, ensuring they do not yellow or become brittle under sunlight.