I have a pair of radar paths and I really like how this(Imgur part of the frame kind of bends into your head and makes a snug fit. I've never seen a Fast Jacket in real life but the pictures shows something that looks like what I'm talking about in the same area. Can anyone confirm?
You can always reshape them to fit as snug/loose as you desire. To me, the Fast Jackets are relatively more comparable fit with Radars than Flak against Radars.