John Kuthe wrote:

Teflon coating on cookware is probably colored due to the stuff they
have to use to get Teflon to stick to the metal of the pan! I doubt
it's for cosmetic reasons. Think about it: Teflon plastic, AKA
polytetrafluoroethylene, is a white plastic, I'd imagine very close in
appeaance and feel to Nylon or polyethylene. You know, white kinda
soft plastic.

So how do they get this super-low coefficient of drag plastic to be
this thin brownish coating that sticks to cookware but little else
once it's on the cookware? I wanna know!

The Wikipedia article on Polytetrafluoroethylene says:
"In 1954, Kansas City buisnessman [sic] Marion A. Trozzolo
created the first pan coated with Teflon non-stick resin."
Linking to:
http://en.wikipedia.org/wiki/Marion_A._Trozzolo

Supposedly eVENT is more breathable than Goretex, but like Goretex,
eVENT is a PTFE based fabric. Sorry for the old 2001 link:
http://verber.com/mark/outdoors/gear/breathability.pdf