If your outdoor cushions constantly battle mildew, the problem likely lies in the fabric choice. Mildew thrives in damp, porous materials that trap moisture. The best fabrics for outdoor furniture cushions are specifically engineered to resist this.
The undisputed champion is solution-dyed acrylic, with brands like Sunbrella leading the way. The color is embedded in the fiber itself, making it incredibly fade-resistant. More importantly, it is water-repellent and quick-drying. Moisture from rain or humidity sits on the surface and evaporates quickly, never penetrating deeply enough to promote mildew growth. Its tight weave and synthetic composition also make it resistant to rot and mildew.
Other excellent options include polyester with a high-quality water-resistant coating and vinyl, which is completely waterproof and easy to wipe down but can be hot and sticky.
Avoid natural fibers like cotton or canvas, as they are highly absorbent and become a breeding ground for mold. When selecting any fabric, look for a tight weave and ensure it is designed specifically for outdoor use. Pair your fabric choice with good habits: store cushions in dry, well-ventilated areas when not in use for long periods and clean them regularly to prevent dirt and organic matter from trapping moisture. By choosing the right technical fabric, you can finally enjoy your outdoor space without the constant fight against mildew.