You probably never realized since it can vary depending on the level of tint and no one is really broadcasting it. Spotting some tinted carbon fiber won't be easy and might come off to some people as how it came off the production line.
I want to say Carbon Kevlar but just can't see it happening on an OEM level or in a Ford truck.
That style of bumper is usually largely accepted, even on SUV's that have an off-road theme going on. Always liked winch bumpers. Originally seen them on Jeeps and some tactical SUV's and liked them every since