Outdoor furniture cushions face a constant battle with the elements, and rain is a primary concern. Their performance in wet weather largely depends on the materials and construction. Many modern cushions are designed with weather-resistant fabrics like solution-dyed acrylic or polyester with a waterproof coating. These materials shed water rather than absorbing it, allowing cushions to dry quickly after a shower. However, "water-resistant" is not synonymous with "waterproof." Prolonged or heavy exposure can eventually lead to moisture seeping into the filling, which may cause mildew, mold, or unpleasant odors.
For optimal performance in the rain, it is highly recommended to use cushion covers made from specifically waterproof and UV-resistant fabrics. Even with quality materials, best practices include shaking off excess water and allowing cushions to air dry completely in the sun before placing them back on furniture. For extended rainy periods or winter storage, bringing cushions indoors or using dedicated waterproof storage boxes is the best protection. Regular maintenance, such as cleaning with a mild soap solution, helps preserve the fabric's water-repellent properties. Ultimately, while many cushions are built to withstand occasional rain, proactive care and proper covering are essential for ensuring their longevity and comfort through many seasons.