The X-Series originally was a collab model for any new ideas were working on with team guys. That sorta went out the window??? Since then it has sorta stuck as a good wave shortboard Typically weve done this for guys going to Hawaii or traveling somewhere w/ power, Nick Rupp has taking a liking to this model for soild hurrican surf or anytime ridding a shortboard in some chunk. Joaquin Castagent won the QuickPro in pumping Herradura (Peru). Features double concave for extra hold, Basically the PerfSIII w/ rocker + pulled in tail. Handels Power