Such a cool idea! It makes me think of what if somehow we become something else after a post-apocalyptic war and the Earth is left with sand dunes... like in the movie mini-series Frank Herberts Dune... if we turned into the sand worms.
Love the design! Is it one or two pieces? The upper edge is a little bulky, but it doesn't distract too much, since the piece is so strong. I didn't see the eyes or mouth at first. Good job hiding them. Although, if you want to get rid of the eyes completely you could you use pieces of black/dark nylon stockings to cover them up. (I've used that for masks and you can see through and breath through just fine)