The clasps aren't bad, but they are a symptom of the way the cape is done, which isn't as comic-like as it could be. And, they could be a little subtler, as it is they're big chunky triangles. But at least they aren't little bat-symbols.
What I wouldn't mind seeing it ONE clasp, small and black, in the centre below his neck, from which both sides of the cape would hang and fasten together. That would be comic-style and very logical.
Something like this toy (I've got one too, it's nifty)... you can see a round thing in the centre that looks like a clasp: