Roof membrane material

[GraftonGuns]

Hi All, So I installed a 2nd AC unit on my 2017 Eagle HT 27.5 RLTS. It works excellent. I have a question concerning the roof membrane. What is it. When I removed the bedroom vent to install the 2nd AC unit I happen to feel the membrane and took notice that 1. it is thin and 2. I can't figure out what the material is. It does not feel like rubber,say like a residential roofing membrane EPDM. Any thoughts? Thank You in Advance.

[Siamese]

Usually you can tell by what color the back of it is. Search that online or I'm sure someone will chime in who already knows. Almost doesn't matter, as the care and feeding is pretty much the same for the various materials.

[wanderlust]

https://www.youtube.com/watch?v=KL5qJw397Rc

[Sundancer330]

Jayco specs for that year show, Magnum Truss™ Roof System with one-piece, seamless DiFlex II material.