While it may be tempting to use regular indoor cushions on your balcony or patio furniture, this is generally not recommended for long-term use. Indoor cushions are typically constructed from fabrics and fillings that are not designed to withstand outdoor conditions. Exposure to sunlight will cause their colors to fade rapidly, and rain or humidity will lead to moisture absorption, resulting in mold, mildew, and unpleasant odors. The filling, often made of standard foam or down, will clump and degrade when wet.
Specifically designed outdoor cushions use solution-dyed acrylic or polyester fabrics that are UV-resistant and water-repellent. Their fillings are usually quick-drying foam or fiber. For a temporary solution, you can use indoor cushions outside if you bring them in immediately after use and never leave them exposed to rain. However, for durability and hygiene, investing in properly rated outdoor cushions or using high-quality, water-resistant covers designed for indoor cushions is the wiser choice to protect your furniture and ensure comfort.