I think Line makes pairs of skis without edges for Will so he can slide whatever he wants without catching and edge. He slid a tennis net and a fence, he can definitely slide a slack line.
And I think there was a shot of someone actually sliding on a slackline in a 4bi9 trailer
ninthward is coming out with a pair. not kidding. inb4 ninthward sucks
"What I care about is being able to click into my skis for the rest of my life. I care about being on top of the mountains with my best friends. If I'm on my skis, I've got a big smile on my face. And I want to keep it that way." T-Hall http://vimeo.com/thenewsolution