A few months back on a site that a lot of us visit, or some catalog. They appeared to me (at first glance) to be pants designed for rock climbers. They went past the knee, but stayed high enough to not be a discomfort on the calf. They also (if memory holds up) had the ability to use internal knee pads. May have been nylon. multiple attachment points, and zippered pocket. Maybe if you remember parachute pants...but 3 quarter length.