I have a pair of super-lightweight carbon fiber Mavic Zxellium roadway cycling shoes with Look Keo cleats. They're terrific shoes, but I offered my road bike so I do not need these anymore. The shoes are extremely ergonomic and I constantly loved the mesh upper parts that keep your feet cool. Even with the cleats attached each shoe only weighs 360g, which would put them around 325g without the cleats.
As you can see from the photos, I didn't get lots of opportunities to ride these. Even the soles are in fantastic shape! There is a light, but large scratch on the bottom of the left sole. The shoes are size 11 United States / 10.5 UK / 45-1/3 EU and the cleats are have 4.5 degrees of rotational float.
Energy full carbon sole.
Energy frame.
Energy lock carbon.
Ergo lite ratcheting strap.
2 velcro ergo straps.