Why use a natural nail brush... In the case of plastic nail brushes, the plastic bristles will eventually come out or break off creating secondary microplastics that then enter our waterways causing harm to animals and marine life. Wild and Stone Nail Brushes are completely plastic free, including the packaging. They are made from FSC certified German beech wood and Sisal Bristle. Meaning they are 100% biodegradable once they have come to the end of their life. Sisal, with the botanical name Agave sisalana, is a species of Agave native to southern Mexico. Yes this is the same plant that gives us tequila. As a natural fiber r, sisal is a renewable and sustainable material. Product Details FSC certified German beech wood and natural Sisal fibre -vegan bristles. 100% plastic-free and biodegradable. Measuring - 9.5x3.5x4.2cm Vegan