I think you might be ok with the nylon ones but the polyester ones im not sure of a the hash would stick to it i think but the price is good. Or get some from porchmonkey4life's nana she might help.I was wondering if you could use other filters to make bubble hash, like the ones used to filter biodiesel, they come in 200-55 micron nylon monofilament bags and 25-1 micron polyester glazed felt bags. Take a look at these bags, and let me know what you think.