When selecting cushion fillings for outdoor sofas, durability and weather resistance are key. Here are the top options to consider:

1. Polyester Fiberfill – Affordable and lightweight, polyester is a popular choice for outdoor cushions. It dries quickly and resists mildew, though it may flatten over time.

2. Foam (Closed-Cell) – High-density foam provides excellent support and comfort. Closed-cell foam is water-resistant, making it ideal for humid or rainy climates.

3. Quick-Dry Foam – A modern innovation, quick-dry foam combines comfort with rapid moisture evaporation, preventing mold and mildew buildup.

4. Outdoor Down Alternative – Synthetic fills like Sunbrella® offer a plush, down-like feel while being resistant to moisture and UV rays.

5. Recycled Materials – Eco-friendly options, such as recycled PET fiber, provide cushioning while being sustainable and resistant to outdoor elements.

For longevity, choose fillings with UV protection and waterproof covers. Rotate cushions regularly to maintain shape and ensure even wear. With the right filling, your outdoor sofa will stay comfortable and stylish for years.