Only what belongs.
REIN makes products for daily care. Nature does most of the design.
Made to be seen
A daily-care product stands in sight far longer than it is in use, so it has to look right: quiet, proportioned, worth keeping out. Every element earns its place, or it goes.
Only the best of what grows
Bamboo, horsehair, steel, stone — high grade, barely processed, free of plastic. Fewer parts, better parts.
Gentle on body and world
Soft bristles, because the evidence prefers them. No plastic, because a mouth is no place for it. Care that fits the rest of a healthy life.
No plastic. None.
Every REIN product is free of plastic. Not reduced, not recycled — absent.
- No plastic in the product.
- No plastic in the packaging.
- No plastic in the post.
This matters more than it used to. Plastic wears, and a plastic brush wears in your mouth, twice a day. Microplastics have been found in human blood and placenta; several common plastic additives are known to interfere with hormones.
The full consequences are still being studied. We would rather not wait for the results with plastic between our teeth.
Pure, and held back.
Rein is a Dutch word for pure — clean in the plain sense: nothing added, nothing left behind.
In English, a rein is what holds a horse back. Both meanings apply here. The products should be clean; making them asks for restraint.
That our first product has horsehair bristles is a coincidence. A good one.


Grown, not extruded.
Bamboo, horsehair, steel, stone. Materials that were something before us and remain something after. We process them as little as possible: cut, cleaned, brushed, left unfinished.
That costs more than moulding oil, and you see it in the price. In return: gentle on the body, little left behind, worth looking at. That is what better means here.
Few, and chosen.
Four categories. Two products, today. Everything on this site is selected by people who spend their working days on health, design, and build quality — and most of what we consider is rejected.
The test is simple: if it is not clearly better than what you already own, we do not sell it.
REIN is a small studio in Amsterdam.
We write two letters a year, when there is something to show, and we answer our own mail.