Problem with padding as part of the pants is that it can move around easily. And that's something you don't want padding to do, it should stay in one place, thight on the body.
Even the paintball specific padding has a tendency to move around.
If you want knee protection that stays in place, have a look at any site that sells American football gear. They have so called padding shorts that have these pockets for thigh and knee pads, which will keep the pads in place all day long.
Plus your girlfriend will think you are dead sexy in spandex, though your friends might frown a bit...
Even the paintball specific padding has a tendency to move around.
If you want knee protection that stays in place, have a look at any site that sells American football gear. They have so called padding shorts that have these pockets for thigh and knee pads, which will keep the pads in place all day long.
Plus your girlfriend will think you are dead sexy in spandex, though your friends might frown a bit...