GNU Impossible Asym Sym Sync EC2 PBTX Snowboard - The GNU Impossible Asym. Sym. Sync EC2 PBTX snowboard. More technical than any board in history. Don't let the tech scare you, the Impossible series snowboard is very rideable anywhere on the mountain. With Specific Toe and heel edges, plus Magnetraction, the new impossible is anything but. This snowboard is all about balance through asymmetry to the next level. Take this snowboard for a run an allow your movements and the board to become one. It's almost like being able to think the board down the hill. So responsive and easy to ride all new levels of joy and performance can be reached on the GNU Impossible series snowboard.