Gaia Guy Natural Bristle Bamboo Toothbrush with Boar Hair
$18.99 / 6-pack
Best accessible North American option: bamboo handle, boar-hair bristles, nylon-free, biodegradable.
Sourcing transparency is weaker than ideal. Dry thoroughly between uses.
A US source in the The Unmasked Face directory. Check that it ships to Europe; where it does not, the directory lists a European alternative alongside it.