Sustainability is becoming an increasingly important issue in the tobacco industry for both conventional cigarettes and heated tobacco products. One item coming under scrutiny is the filter. Filter development is switching from cellulose acetate, which the EU considers a plastic under its singleuse plastic directive, to biodegradable material. A biodegradable filter disintegrates naturally after a period of time. It is an ambitious task to develop and produce such sustainable products: environmental regulations must be met and consumer tastes must be matched.