Acala\'s eco-friendly toothbrush is made from FSC certified bamboo. The charcoal infused bristles are medium, ideal for plaque removal without undue wear on the gums. Made from compostable bamboo. Bristles are nylon, please remove bristles before composting. Comes in a recyclable and compostable cardboard box. Naturally antibacterial bamboo handle & BPA-free bristles. Replace this toothbrush around every 3 months. Store upright, in a rack or cup, where it can dry out.