Insulation for a (Relative) of Fermentation Chiller

[metasyntactic]

I'm figuring out the design of a fermentation chamber, and I'm wondering if the soft, fluffy sort of insulation might be a better fit, given that I don't intend to use it for structural support. (The shell needs to be wood, so that I can stain i and make it look like a presentable piece of furniture.)

Does anyone with actual experience with insulation have advice for me?

 

[Rendomike]

I wouldn't want fiberglass insulation around my beer. Seems like a bad idea. Why do you want to go that direction with the insulation?

 

[metasyntactic]

I'm just considering the options. It occurred to me that the other designs used rigid insulation by necessity.