Agree with the XR1 post re: PK vs other material. I was about to post the same thing and you beat me to it, you scalawag.
As I mentioned earlier, the pinstripe ones are a Spanx-material. That's what the pinstripe black XR1 dropping in September is.
Not sure if these PK XR1s are going to be good investments with the way these are dropping. Obviously I buy shoes for the way they look and feel, but if I'm spending the $$$ I would like to think that time will prove them worth the time and effort of fighting the hordes to secure a pair. The PK vs Spanx material may be the defining factor.
Right now strongly contemplating sitting this drop out. The September XR1 with the black boost looks better than all of these IMO and the hype around that one may help it endure as a smart buy. On the fence.