These are the first bamboo interdental brushes I've seen and they will be an answer for so many of you who have been on the hunt for a plastic-free option to these! Even though the bristles are still BPA free nylon, this is a huge step in the right direction when it comes to cutting down on plastic in comparison to the plastic interdental brushes that are currently the only option on the market. The bamboo handle will cut down on plastic waste as well as Hydrophil sending everything plastic-free which is amazing so that again reduces so much plastic waste! The Interdental brushes have a plastic-free bamboo handle with BPA free Nylon bristles and are attached to thin metal wire. SIZES AVAILABLE 3 = 0.60 mm 2 = 0.50 mm 1 = 0.45 mm 0 = 0.40 mm Please be aware that bristles are still BPA-free nylon so these must be removed before putting the handle in your compost bin. Tip - I save my old ones for cleaning hard to reach places in the house and only get rid when I really need to!