u/Brickelsworth

I want to make/buy mesh bags that have a maximum hole size of 0.1 mm or less.

I am conducting an experiment that will involve leaving the mesh on the forest floor all summer with decomposable materials inside the bag. I want to exclude all insects from entering the bag, but I want bacteria and fungi to be able to get it in.

Any suggestions for where I can find mesh/mesh bags with 0.1 mm hole size that is non-biodegradable?