If the title seems a bit oxymoronic, well, that's because it is to an extent.

Lanvin might make some extremely nice sweats but for $750 a pair, I'll leave others to find out how awesome they are.

Sweatpants should serve two primary functions

Comfort
Ease of movement

These two functions place sweatpants firmly on the top 10 list of performance gear necessities. Which is why pretty much every one from LeBron James to your grandma has a pair. Though with options abound as sweatpants have become a staple in fashion house's repertoire, the choices are endless. Whether you are on a budget or ballin', there's no reason not to add a third function: style.

Keep it slim through the lower leg and don't be afraid to spend some cash. I won't go as far as Han Kjøbenhavn and say that this is in anyway acceptable, but with a nice pair, you won't think twice about leaving the house in them. Pair it with an oxford and don't try to hide that fact that they are sweats. Because everyone will know anyway.

Acne Grey Melange Sweatpants - Clean, modern and simple. How Scandinavian. I have several pairs of these and they've held up a few years too without looking worn out. Worth the investment.

1295 NOK at acnestudios.com

Quality performance fashion sweats:

Zara, Club Monaco, T by Alexander Wang, Todd Snyder x Champion, Diesel, Undefeated and, of course, Nike

Nike Tech Fleece Pants - Nice enough to mention twice. Fit - check. Simplicity - check. Performance - Check. Really, what more do you need? You won't want to take them off but make sure to wash them if you train in them, yeah?

$80 at nike.com

Aether Heavy Fleece Sweatpant - These don't exactly have the slim lower leg that is ideal when outside of the performance arena but the fellas at Aether got that good looking performance gear on lock so I'll let it play. They're a no frills type of sweatpant.

$75 at aetherapparel.com

All pairs I've tried, but by no means a comprehensive list. Just scroll through the 17 pages of sweats over at Asos and you'll see what I mean.