Park chairs are designed to withstand harsh outdoor conditions, and preventing filler deterioration is a key focus in their construction. Manufacturers use high-quality, weather-resistant materials such as polypropylene or polyethylene foam, which resist moisture absorption and microbial growth. UV-resistant coatings are often applied to protect the filler from sun damage, preventing cracking and fading. Additionally, proper ventilation in the chair design allows moisture to escape, reducing the risk of mold and mildew. Regular maintenance, like cleaning and covering chairs during extreme weather, further extends their lifespan. These strategies ensure park chairs remain comfortable and durable for years.