Flexible resin (for phone case)

Hello, a noob here, I understand the the Phenom is able to print flexible resin. I was thinking of printing a phone case.

  1. I saw Siraya Tech’s Tenancious (is perhaps more flexible?). I don’t know how flexible this is but will it be flex enough for a case ?

  2. The recommended flex resin is the PhotoCentric Resin. How is this compared to the Siraya Tech’s tenancious?