The soft and flexible bark of the birch tree is also called birch leather. It contains essential oils with a natural preserving effect, which makes it ideal for making food containers. The leathery bark has traditionally been shaped to form vessels, shoes, backpacks, knife sheaths, mats and baskets using sewing and tucking techniques - a material with almost limitless possibilities. But it also has many technical and usage-related advantages. Birch bark is extremely durable, very light (380-550 kg/m³), fungistatic and bacteriostatic, water-repellent, highly moisture-resistant, slip-proof even when wet, easy-care, sustainable and ecologically produced. This birch bark is from Siberia. Central European bark is too thin for use in handicrafts.