Product detailed description Reviews Materials upper part synthetic water-repellent fabric synthetic fur inside rubber sole   In the size chart we always indicate the inner size of the shoe. We prepare the size chart based on our own measurements with the Plus 12 (internal length) and Clevermess (internal width) tools. The optimal oversize for winter boots for adults is 0.5-0.8 cm. Recommendations for foot measurement and choosing the right size:  Made in China, the materials meet European standards and are safe. winter boots Xero shoes Alpine W Black new