Who's designing these armored pants rain liners?

I've noticed quite a few makers of expensive armored clothing - of the
jacket and pants variety - also sell Gore-Tex or some other liner to go on
the "inside" of either: Motoport and BMW clothing come to mind and neither
is cheap.

I asked the Motoport people about that, but senility prevents me from
passing on their answer. I think it had something to do with wanting a
product that fared better in hot dry weather, and was adaptable to wet
weather, than the other way around. Having worn it in 100+ weather for
several days going to and from Moab, they did a good job of it.

No problem taking the jacket off to put in the liner should it start to
rain.

But who ever thought someone was going to take his pants off along the road
to put a rain liner in? Seems an outside-of-the-pants rain pant would have

You don't/can't put the waterproof liner in or take it out, it's all part of
the "build", it's the THERMAL lining that's removable.

Check again. The Gore-Tex zip-out lining on my BMW riding suit is quite
waterproof but adds little insulation.

If you're wearing a wicking layer under it's no problem.

been a better idea.

You mean something like a $25 rainsuit from the corner hardware
store ? How could you possibly show off your expensive riding
suit while wearing such a thing ?