Our brushes are made from coconut fibers and bamboo that are naturally grown. These are a great alternative to throw away plastic brushes that create unsustainable living conditions in our own homes. These brushes are made from the highest quality plant fibers and bamboo, all of which are plant-based and biodegradable not leaving a carbon footprint on the planet. These brushes would easily last for over a year if put to good use daily at least once.