My Bass Traps - Finally!

I've got this ledge around the top of my room. I've thought about making really long panels that just sort of hang on the ledge, like a coat-hanger. I'd be interested to know what materials to get.
 
Your room looks alot like mine, with the angled ceilings - I have my mix setup perpendicular to the angles (unfortunatley, this is the only way to get my gear into the room). So, sound in my room is not at all optimal for what I need - hopefully a move is in my future and I can do a proper mix room.

Looks real good dude.
 
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