Once upon a time, and our younger readers are going to have to bear with us on this one, trainers were footwear you wore to do physical activity.

Actual sport.

I know, I know, it sounds crazy, but you’d go into a sport shop (they used to sell things like cricket pads and badminton racquets) and you’d ask for a pair of tennis shoes, or running shoes, or even cross-trainers, if you were feeling a bit undecided about which physical activity you were going to undertake.

But now, oh my goodness, now trainers are more than just footwear.

They are a fashion, a fetish, an industry, even a currency, and the rarer they are the more desirable they become to the sneaker freaks out there.

If you want to see what the latest must-haves are, you could try thedropdate.com, where they show all the coolest trainers trends, from retro classics to custom limited editions.

These are not your average plimsoles.