EBB Cotton Filters are made of organic cotton and intended to be reused for at least 100 times. The cotton is grown in Texas. No insecticides, herbicides, pesticides, or dyes are used. The fiber is safe for brewing coffee and can be disposed of in the household compost. EBB Cotton Filters are a good way to replace throwaway paper filters for various brewing methods such as Aeropress, Hario V60, Kalita Wave or Chemex.