Type of tubing & crimps?

Gentlemen… Can anyone identify this red plumbing tubing under the kitchen sink? House built in 1985 but this is probably not original to the house. I have not seen this type of crimp ring either.

Just a guess,PEX or Polyethylene

http://www.sprinklerwarehouse.com/Murray-Poly-Irrigation-Crimp-Clamps-p/271ss.htm