To use this silicone swim cap, first make sure your hair is tied up if it's long. Then, stretch the cap gently and place it over your head, smoothing it down to ensure a snug fit. When you're done swimming, rinse the cap with fresh water to remove any chlorine or salt. Let it air - dry in a cool, shaded place. Avoid exposing it to direct sunlight for long periods as this can damage the silicone. Also, don't use sharp objects near the cap to prevent snags.