A: We are very confident in our products.
Organic Cotton Nut Milk Bag - 365 day warrantee*
Hemp Nut Milk Bag - 420 day warrantee*
Organic Cotton Cheesecloth / Strainer Cloth - 365 day warrantee*
Hemp Cheesecloth / Strainer Cloth - 420 day warrantee*
*For material malfunction (tear in cloth, thread breaks).
We do not offer a warranty fungus** and bacteria, because proper cleaning and drying is out of our control.
I have a very clear FAQ that specifically addresses maintaining your 100% organic cotton material product to be free of fungus and bacteria. See the FAQ "Q: How do I prevent organic cotton nut milk bag or sprouting bag from getting moldy?" in the "Products" section. Just click on the section and it opens up in a pull down action.
**Both mold and mildew are part of the fungi (fungus) kingdom.