Flight Socks (Support socks) when you fly is a good idea!
Sitting is not good for blood flow in the legs and can cause blood clots.
This can be counteracted by using the support socks!
There are different hardness in these flight socks that you have to take into consideration! Mild/Low 12-14 mmHg is good to use.
But between 15-21 MmHg is to bear as these have a better quality and do their job better because of a larger compression in the Flight Socks.