How to wear it? Well, if you add to the "equation": leggings + shiny fabric. The solution is unpredictable.
I think that the trick is to wear it with something plain that doesn´t try to out-shine the already-shiny leggings. That means:
plain non-shiny top or shirt which can be monochrome or printed. It can be fitted (if you have the body for it) or baggy, which will cover your waist and bum (this silouette is ideal if you have the perfect legs but not so-perfect torax, yes, I mean the belly. The trick works, believe me.)
However, I have to say that this look is not suitable for people whose shoulders are wider than their hips because this look will accentuate them even more.
Option B. the risky one but the most gorgeous one! I would love to wear this shinny leggins with a gorgeous black lace top. It´s edgy, feminine and gothic! Obviously, it´s not suitable for everyone, again....
Here´s an example.
Gorgeous lace top, 65 pounds. Handmade by me, The Black Wardrobe. You can find it at the Rose And Anchor boutique, in Liverpool. (00 44) 0151 707 3590
Shinny skinny pants, 65 pounds from Topshop. (You can find more different ones and with prices which can be cheaper or more expensive, in other mainstream retailers)
Ankle lace boots. (These gorgeous pair is not from this season, sorry. Although, they´re very trendy at the minute and you can still find them in some shops).