What's the real deal with compression socks?

Into yet another edition of the Ask Coach Parry podcast, I’m Brad Brown, Lindsey Parry with us once again. Question in today from Val Opperman. Val is asking about gear and specifically about compression socks. We’ve spoken about it before here on the podcast, but the jury, I think, is still out. A lot of people swear by them, a lot of people think they’re snake oil and they’re absolutely rubbish. What’s the deal, compression socks or not and what’s the latest scientific evidence relating to the benefits of using them?