To keep your Forever Brush head fresh and performing up to snuff, just remove and replace the biodegradable head every 4-6 months Recycled : Product is made of post-consumer material and byproducts that have been recovered or diverted from solid waste, and have been utilized in place of raw or virgin material in manufacturing a product. Organic: Product does not contain any growth hormones, unauthorized synthetic pesticides, antibiotics or synthetic ingredients, and has been produced following organic production processes. Plastic-free : Product does not contain plastics created from polymerized crude oil. Refill : Product is designed to be reused and refilled to reduce single use packaging, or is a refill version that’s designed to have less packaging than the initial purchase unit. Vegan : Product does not contain any animal ingredients or animal-derived ingredients. Upcycled : By-products, waste, and other unwanted material are reused to create this product.