Have seen these years ago at Daytona worn by a GP rider from Europe. Never really took off. Mostly ,,,leather works. everything else grabs. So it may wear better but if it causes you to tumble over sliding, that's not good. You don't see any world class riders wearing them ,,and one would think they would if they were better. I do know the rider that wore them years ago at Daytona had trouble and eventually went back to leather. You most likely won't see them here as the cost would be much higher then leather. Higher cost means less return for the reseller. Not to mention higher reseller cost is higher duties and so on and so on. Your retail is dictated by leather cost.
Good leather works.