Reversible Copper water resistant fabric to a sheared white beaver jacket. Functional, practical, and a bit funky. The style is simple, the fact that you can wear it inside out and outside in is a bonus. But you are being functional and instead of buying many jackets you have one go to jacket for the most part. Its great for the days in spring where temperatures rise but still cold. This helps control your body temperature. Any natural material always allows your body temperature to be normal. If you are hot it cools you down. If your cold it warms you up. Without knowing one thing for certain wearing natural products is a great benefactor to how your body works. Just like milk it does a body good.