How can I describe see-through clothing vision?

Penetrative vision, from penetrate: to see through

keen eyes that penetrate the darkness/mist. etc.

It is not substantially different than X-ray vision, which is also penetrative. The idea of selective penetrability has always existed in "Xray vision": to see a gun under a coat, or a room behind a wall; one can see what one desires to see.

I would refer to it as "X-Ray Specs vision," after the novelty item that used to be promoted (along with Sea Monkeys and the opportunity to sell subscriptions to Grit magazine) in the back section of old comic books. The slogan for X-Ray Specs was "See the bones in your hand, see through clothes!"

As Wikipedia's X-Ray Specs article points out, a number of modern technologies permit actual (instead of illusory) viewing of bodies under clothes, including (most controversially, because it's used in airports) backscatter X-ray technology. So if you wanted to up the creepiness quotient of your desired super power, you could forgo the cutely retro name "X-Ray Specs vision" in favor of the disturbingly current "Backscatter X-ray vision."