Maybe a closed cell foam padding like Volara?

I looked at the Talas website and they have it all. Thank you again.

So Artsorb has a desiccant that is thin like paper? I like the idea of using hollytex as a barrier! Thank you.

1 object is a poster the other is a cloth patch. Both are going to be individually mounted in a case displayed vertically. I do not think either have been treated in any way. They are asking to mount them to museum board with poly strips with the desiccant paper in between. There will be discussion coming up in the future on the project so maybe a different solution may be approached but I just wanted to know if anyone has worked with such product so I can educate myself prior to the meetings.

Through a conservator colleague of mine I was advise not to use the instapak for long term. Since it is polyurethane foam even if it is encapsulated the of gassing can affect the structure of the bone. Also it will break down over time rendering it inefficient for support. It is great for short term, one time use, transportation purpose.