According to inCrysis.com member Mocib this image is a high-polygon rendered image:
"That image came from crytekfan.com and the edited image (linked on those sites) came from the incrysis.com forums. It is a high-polygon nano muscle suit render i.e. not representative of what it will look like in-game. The nano suit will be very detailed in the game of course but not just that hi-poly detailed.
So, to put it short, it's a leaked not in-game screen shot."