The Bull Brand 6mm Eco Filter Tips are not treated with bleach, giving them their distinctive natural appearance. They are constructed without the use of chemical adhesives to bond the fibres making them bio-degrade more rapidly then standard cellulose acetate filters. Also, the filters' wrapping means that they can degrade within 30 minutes once in contact with water making them much more environmentally friendly. They provide all of these benefits whilst still maintaining a similar taste, usual Bull Brand quality and ease of use to a standard filter. The average bag contents is 200 filters.