A few pointers, which I will elaborate on when I edit this post:
-Inconsistent lightsource. I think things would appear clearly if it were overhead.
-Anatomy could be tweaked. Arms too low?
-I agree with CMC, the shirt's getting in the way. Some areas don't make much sense, but I suppose it's supposed to seem torn. Even then, it doesn't look much like a shirt and could be gotten rid of.
-Some banding in various places.
-The silhouette of the character alone, without looking at inner details, doesn't make itself very clear.