I swam the English Channel in these goggles on 18th July 2021, starting at 4am. I needed a pair of goggles for both the darkness then bright sun shine. I did not touch my goggles in 12 whole hours. I have never had this with a pair of goggles ever. A spray of anti fog before putting them on and didn’t touch them until France. I cannot recommend Swans enough. I have swam all my life and never worn such a great pair of goggles.