Nail brushes are excellent for giving your nails and hands a deep clean. They work well with solid soap too. FUN FACT Most nail brushes we found were made of tree wood. Our suppliers don?t consider trees to be at our disposal and try where ever possible to use bamboo and therefore requested our producer to use bamboo to create our nail brushes. COMPOSED OF Bamboo and sisal. Totally compostable. Once the bristles have ceased their original purpose of cleaning your nails thoroughly why not explore other options for use. If none can be found, chop into pieces and add it to your compost heap where it will happily break down.