Via Put This On, the Norwegian Curling Team's Official Trousers:
One of the dudes bought a pair of these, liked them, and convinced his teammates to get some and make them part of the uniform. Boom. Pants.
By the way, they come in blue and gold as well. And there's a matching jacket. Where were these bad boys when I was tailgating regularly? Can you imagine strolling around the JACC lot in these puppies? BMOC absurdity.