foam, latex, foam rubber... what is the difference?

I'm curious as to what each of these would be used for. Latex is usually thinner right, its what is commonly used in masks and prostethics (sp?) correct?

So, I guess really the difference between foam and foam rubber. I'd think what I want to used for modeling with is foam rubber, I need something somewhat stiff that can be cut/carved. Almost like the texture of those wedge sponges that come with halloween make-up.

If anyone knows of an online supplier for this stuff as well I'm going to need a few chunks of the stuff.

Burman Industries and Smooth-On, both carry what you're looking for. Monster Makers usually does, but it's frequently out of stock.

I would have to agree with the Smooth - On company. THey are great and have some fantastic products.

Started reading up on the stuff. The kind of stuff i'm looking at making is latex that is foam filled.

I guess I need to just working with it.

Thanks for the tip on smooth-on.