Material scientist (or near enuff) advice needed about certain properties of materials?

i need a material mainly for the purpose of insulation yet ';breathable'; like lets in and out air, while safe for human's longtime exposure to it.


i was thnkng mayb foam but not sure if its safe or other properties of it.


any ideas of what exact materials fit this description and their properites (or close enuff, noting any disadvantages).


ThankyouMaterial scientist (or near enuff) advice needed about certain properties of materials?
What will you use this for?





Well anyway, I immediately thought of fiberglass insulation blanket, same (or similar) to standard fiberglass wall insulation available at any building supply center. It is safe, fire resistant, cheap, good R-value. You would need to add a layer of fabric if it is to touch skin, since it can be very itchy!


Of course, there are the obvious: wool, polar-tek, down - the list goes on and on.





Hope this helps


Bill