[Kiowa Warrior]

Yes, I immediately thought of Charlie and his hoodie when Miles was wearing his! It's like when Charlie wore his he was trying to shield himself from something - to make himself out as not being associated with things - and I reckon that Miles knows something bad will happen to Claire but he's trying to hide himself from the others by using his hood: he's trying to make himself less approachable and threfore less able to talk about what he knows.