Please note:
(1) Anti-fog properties are not permanent and will be weakened and disappear when in use.
(2) Some suggest making a spray: Mix 2 parts baby shampoo and one part water and spray into each lens. Allow it to dry for 10-15 minutes before going swimming.
(3)Do not leave your swimming goggles in direct sunlight as this can dry out the soft silicone bezel and make the colour fade.