Vibram Disc Golf - Durability Testing. We take an X-Link Ridge and throw it against a cement wall 10 times. Then we do the same with plastic discs that are comparably grippy. Grip vs Durability. With X-Link, you don't need to compromise. View Part 2 to see X-Link vs. Premium Plastic: http://www.youtube.com/watch?v=HAJout_4Suc