Down pillows can generally be machine washed, but it is important to follow specific care instructions to maintain their quality and longevity. Downpillows.com often recommends checking the label on the pillow for care guidelines. In most cases, using a front-loading washing machine is preferred, as top-loading models might be too rough on the delicate down filling. It is usually advisable to use a gentle cycle with cold water and a mild detergent. Adding a couple of clean tennis balls to the dryer can help fluff the pillows as they dry, preventing clumping of the down. Additionally, ensure that the pillows are completely dry to avoid any moisture build-up, which could lead to mold. If you are unsure or if the pillow is particularly valuable, consulting the manufacturer's instructions or the specific page on downpillows.com may provide further clarity and care tips.