I didn't know this, if I did I would have chosen them over the stupid Anteras rings. I really just wanted the PU ring installed, but if I could switch to semi flexible rings in the summer and wet gloves I would have done that.AFAIK, you can only get Zip seals from DUI.
But, the Slaggo rings are flexible. Not AS flexible as Zip seals, but pretty flexible. They only become inflexible when you install a dry glove ring system into them (e.g. Ultima). If you just keep them as wrist seal-only, then they are still flexible. And, of course, it's easy to change back and forth, if you want dry gloves on some dives and no dry gloves, but flexible wrist rings, on other dives.
Any pics showing how flexible just that part is? Just the ring with wrist seal?
Edit: I think I'm wrong, there's 2 versions of Ultimas, only 1 works with the Slaggo, the soft set. Someone correct me? That's a deal breaker, I wanted a system that would work with my other ds so I got the PU ring and Rolock 90