Wiring harness protecting wires

[Ricos54]

I'm getting ready to wiring in my truck and I bought the plastic wrinkle stuff, but my friend said if I want my wiring to last a long time I should use something better. He said there's other stuff out there like aluminum tubing like fuel line. Wondering what you guy's are using to protect your wires that are exposed to the elements?
Pictures would be nice to see how your mounting them.

Thanks,
Rico
And Happy Thanksgiving Everyone