The reason they aren't conforming is because those are the dynamic parts. Dynamic cloth items have no bone structure like the hood, they're just props (ya know, solid, rigid objects). To use them, you put Mike in the scene in his zero pose, put in the item(s), then perform a cloth simulation. Basically, dynamic clothing doesn't 'attach' to a character like conforming clothing, rather it hangs off the body like real clothing does.

There's a lot of tutorials on running cloth simulations. I used this one wayback when http://my.smithmicro.com/tutorials/1619.html, but it's fairly out of date. Anyone wanna toss in a suggestion? I'm partial to the youtube ones, but I'm at work and youtube is blocked so I can't suggest one.