Russia leather
Russian leather is vegetable-tanned cow leather or calf leather with thickness of about 1.6 - 3 mm.
Russian leather is processed into shoe leather, bags or saddle goods.
Originally, this type of leather was tanned with willow bark or birch bark and greased with birch tar oil for waterproofing. The birch tea gives the leather its typical smoky smell (like smoked bacon).
Usually vegetal-tanned leather is not particularly waterproofed. But with birch tar oil, the water resistance can be achieved without overfatting leather. The water vapor permeability remains almost fully preserved. Shoes and boots from these leathers hold extremely warm even at very low temperatures and cool at warm outside temperatures.
Today, other vegetable-tanned leather is also called "Russian leather". For example leather tanned with with mimosa, tara or chestnut.
Additional information