BodyGuard®

The fit is snug enough that I forget it's on until my camera bumps a doorframe and I hear the thud instead of feeling it. My body's taken a couple of real knocks with the lens attached and there's not a mark on the paint or the rubber.

The neoprene is thicker and more cushioned than I expected, so it actually absorbs bumps instead of just covering them. Slips on and off easily with the lens attached, which is exactly what I needed for trail shooting.

Slapped this on before a weekend of hiking and it took a few good knocks against rocks without leaving a mark on the body. The neoprene is thick enough that I don't cringe every time I set the camera down, and having it on while the lens is attached makes all the difference.