The latest collaboration between Puma x UNDFTD has released this cool version of the Clyde's.The difference between this version and the last is the Nylon that's used on most of the shoe. That's where the NRC comes in for 'Nylon Riptop Clyde' which makes since now that you have read it. They are definitely worth buying since they only cost $65 bucks, you cant get much cheaper then that for shoes. Nice Kicks has them in stock right now.