FWIW, Wifey recently got compression socks for her 7 hr flight to LA + her 15hr flight to Australia, but took them off for the 2.5 hr flight to NZ. she got up every hr for a short walk to the restroom. she thinks those two things helped her prevent swollen legs / ankles, which she does not normally suffer from. I was impressed with them because they were attractive, meaning if you shop, keep looking until you find some you like the looks of. she did not get them on Amazon so I can't refer you to a specific product right now