http://www.gizmag.com/silent-power-pc-passive-cooling/33145/ The look is funny, and what about dust and pet`s fur
Yeah I'd like to see someone clean that.Maybe if you lived in a "clean room" like they use in data recovery.
Metal that has been cast in a bubbled way to look like foam. Likely still completely metal and if you squashed it it would be ruined. I don't get why they haven't put it in a cage of some form though, that looks incredibly fragile.