It's worth investing a little additional time in your swimsuits' care if you want them to preserve their shape and last for seasons to come. If you're washing them in the machine, use a mesh laundry bag to keep them separate and safe. They should be washed in cold water on a gentle cycle with a mild, bleach-free detergent and let to air dry. Even better, if feasible, hand wash your swimsuits in warm water to preserve the colors vibrant and the form as fresh.