Park chairs are designed with materials and features that minimize the risk of incense contamination, ensuring cleanliness in public areas. Many modern park chairs use non-porous, easy-to-clean surfaces like metal or treated plastic, which resist ash and residue buildup. Some designs incorporate smooth, sloped surfaces to prevent incense sticks from being placed or left behind. Additionally, regular maintenance and cleaning protocols help remove any lingering residues. By combining smart material choices and proactive upkeep, park chairs effectively reduce the impact of incense use in shared outdoor spaces.