THey are awesome. It is best to remove your old strap from the boot and rivet in the booster strap. It is elastic. THey make two kinds. Intermediate and expert. Expert strap is a little stronger than the intermediate. I think it may be 3 ply rather than 2 ply. But anyways, they stretch and allow more movement in your boot or something. My horrible shinbang went away with the strap though. I didn't notice any difference in my turning responsiveness, but someone more advanced may notice.
you are one giant piece of internet suck -...focus....