The WeWood watch brand makes their watches from wood and are totally absent of artificial and toxic materials. They have an admirable environmental philosophy in that they plant one tree for every watch purchased.
Different wood is used to create different coloured watches. The Brown version watch pictured uses wood from the Red Wing Celtis, they also come in Beige (Maple) and Black (Ebony). Being entirely made of wood – including strap makes them feather light at just 42 grams (1.2 ounces).