Product detailed description materials: leather upper - nubuck lining and insole membrane in combination with warm fur rubber sole Velcro straps The optimal excess for winter boots is 1-1.5 cm. Recommendations for measuring the foot and choosing a suitable size:www.footic.com/about-barefoot/how-to-measure-foot/ Made in the Czech Republic, the materials meet European standards and are harmless. Beda winter Blue mandarine with membrane and heel (BF 0001 / W / MK / OP fur)