Faradei Russian tactical winter leather Mountain boots. Winter season made for Russian Army special troops - Spetsnaz, marines, airborne. Genuine leather, latest model, orthopedic insoles and thermal sole. Faradey boot's lining is membrane with insulation. The pore size is about 20,000 times smaller than a drop of water, but 700 times the size of a water vapor molecule. Thus, the membrane retains water, and steam can pass through it unhindered. The result is a high-tech material that is resistant to moisture, protects from cold, retains heat, provides breathability.