The bristles are Nylon-1010 — a bio-based nylon made from castor oil rather than petroleum. Castor beans are pressed into oil, and that plant oil provides the building blocks of the bristle material, so you get the durability and clean feel of a conventional nylon bristle without the fossil-fuel feedstock. The bristles are BPA-free.

Honest answer: most of it, not all of it. The bamboo handle is fully biodegradable — when the brush is worn out, remove the bristles (pliers work well, or snap off the head) and the handle can go in home compost or yard waste. The Nylon-1010 bristles are plant-derived but still a durable nylon, which means they are not biodegradable — dispose of the bristles in regular waste. Any brand claiming fully compostable nylon bristles is overstating it.

Billions of plastic toothbrushes are thrown away every year, and each one persists in landfill for centuries. Swapping the handle — the bulk of the brush by weight — for fast-growing bamboo removes most of that plastic without changing how you brush. It is one of the simplest low-effort swaps in a zero-waste bathroom routine, alongside toothpaste tablets.

The same guidance as any toothbrush: about every three months, or sooner once the bristles fray and splay — worn bristles simply clean less effectively. Bamboo does not change the replacement schedule; it changes what happens to the brush afterwards.

Rinse it after brushing, shake off the water, and store it upright somewhere it can air-dry — not lying flat in a puddle or sealed in a cup. Bamboo is naturally water-resistant, but like any wood it lasts longest when it dries between uses. With basic drying the handle stays smooth and clean for the full life of the brush.

Yes — they are designed as a pair. Chew an ENML toothpaste tablet until it forms a paste, then brush with a wet bamboo toothbrush for two minutes, exactly as you would with any brush and paste. Together they make the whole routine plastic-free: no tube, no plastic handle.

No — that is the point of Nylon-1010. It performs like the conventional nylon used in mainstream toothbrushes: the same flex, the same clean feel, the same durability over a normal three-month lifespan. The difference is upstream, in what the material is made from, not in your mouth.