The Metal Gear series is a pretty popular one with cosplayers, both because it's a famous franchise but also because a lot of the costumes are pretty easy to make!

Not this one.

This Grayfox costume looks like it took some serious work, not just to construct, but also to actually wear, since it can't be easy to see (or breathe!) in that thing.

Operation GRAYFOX [DeviantArt, via XombieDirge]