"Pants So Flexible It Ain't Even Sensible" lyrics

I need pants so flexible
(How flexible?)
Pants so flexible it ain't even sensible
Pants undetectable
(Whatchya mean undetectable?)
It's like I got nothing on
(Hmm)
Naked as the day I was born
(Mmmhmmm)
Most stylish thing I ever worn
(Huh)
People ask me what I got on

I think I got just what you need

Flex Terry
Terry Flex
Pants be better than the rest
I can attest
Marine layer, it's the best
Pants
They are good pants
Flex Terry
Terry Flex