Lights for swimming at night. I only stock green as this is by far the best colour to use. Clip one to your goggles and another to the base of your costume or top of your trunks. I advise to set them to flashing on your goggles and constant light on your back (this way it's easy to tell which direction you're pointed in), this can be done by turning the batteries over.

Note: This is the price for ONE light.