I don't know which is why I am asking, but of how much utility are knee pads? It seems to me, no practical experience have I, that kneeling is sort of a betwixt and between position, it doesn't seem as if you could see and move as good as you could standing and you aren't as stable for shooting and are much more visible than prone. And humans aren't really constructed to kneel for long periods of time.

Like I said, I have no practical experience but everybody seems to have knee pads and I wonder how useful they really are.