What does this thing do?

it's for your rear foot when you surf

just bought 2.

I bought two last go around. They are nice, I have them on a skimboard that I plan to wakesurf with this year. The board is kind of short, but it should work for line surfing at the very least.

That's all I have been buying for wakesurfing, Min size is 51". Way cheaper then buying a new wakesurfer and they are very similar to something like a phase five, just gotta put fins and traction pads on em....

The Dakine traction is awesome too! I bought some for a skimboard that we made and then I picked up 2 more, I am going to put 1 on my CWB Ride and see if that works better than the crappy traction it came with.