(Currently Amended) A polyurethane/polyurea material comprising the reaction product of: a polyisocyanate prepolymer having an NCO group content of 4 to 30%, and an average functionality of 1.8 to 6 which comprises the reaction product of a (cyclo)aliphatic polyisocyanate having an NCO group content of 15% to 60% by weight, and a functionality of 1.8 to 5, wherein said (cyclo)aliphatic polyisocyanate is selected from the group consisting of dicyclohexylmethane-4,4'-diisocyanate, pentane diisocyanate, 1,6-hexamethylene diisocyanate, isophorone diisocyanate, 1,4-cyclohexane diisocyanate, m-tetramethyl-xylene diisocyanate, trimers of 1,6-hexamethylene diisocyanate, biurets of 1,6-hexamethylene diisocyanate, allophanates of 1,6-hexamethylene diisocyanate, allophanates of the trimers of 1,6-hexamethylene diisocyanate and mixtures thereof; with an organic compound having from 1.8 to 5 hydroxyl groups and an hydroxyl equivalent weight of from 150 to 2000 g/eq., wherein said organic compound is selected from the group consisting of OH-functional polybutadienes having a hydroxyl equivalent weight of from 150 to 500 g/eq, OH-functional polyalkylene phthalates, OH-functional polyalkylene isophthalates, OH-functional polyalkylene terephthalates and mixtures thereof; with an isocyanate-reactive component comprising at least one aromatic diamine compound which contains at least two aromatic amine groups and has a molecular weight of from 100 to 1,000; wherein the relative quantities of and are such that the Isocyanate Index is from 70 to 130. a polyisocyanate prepolymer having an NCO group content of 4 to 30%, and an average functionality of 1.8 to 6 which comprises the reaction product of a (cyclo)aliphatic polyisocyanate having an NCO group content of 15% to 60% by weight, and a functionality of 1.8 to 5, wherein said (cyclo)aliphatic polyisocyanate is selected from the group consisting of dicyclohexylmethane-4,4'-diisocyanate, pentane diisocyanate, 1,6-hexamethylene diisocyanate, isophorone diisocyanate, 1,4-cyclohexane diisocyanate, m-tetramethyl-xylene diisocyanate, trimers of 1,6-hexamethylene diisocyanate, biurets of 1,6-hexamethylene diisocyanate, allophanates of 1,6-hexamethylene diisocyanate, allophanates of the trimers of 1,6-hexamethylene diisocyanate and mixtures thereof; with an organic compound having from 1.8 to 5 hydroxyl groups and an hydroxyl equivalent weight of from 150 to 2000 g/eq., wherein said organic compound is selected from the group consisting of OH-functional polybutadienes having a hydroxyl equivalent weight of from 150 to 500 g/eq, OH-functional polyalkylene phthalates, OH-functional polyalkylene isophthalates, OH-functional polyalkylene terephthalates and mixtures thereof; with a (cyclo)aliphatic polyisocyanate having an NCO group content of 15% to 60% by weight, and a functionality of 1.8 to 5, wherein said (cyclo)aliphatic polyisocyanate is selected from the group consisting of dicyclohexylmethane-4,4'-diisocyanate, pentane diisocyanate, 1,6-hexamethylene diisocyanate, isophorone diisocyanate, 1,4-cyclohexane diisocyanate, m-tetramethyl-xylene diisocyanate, trimers of 1,6-hexamethylene diisocyanate, biurets of 1,6-hexamethylene diisocyanate, allophanates of 1,6-hexamethylene diisocyanate, allophanates of the trimers of 1,6-hexamethylene diisocyanate and mixtures thereof; with an organic compound having from 1.8 to 5 hydroxyl groups and an hydroxyl equivalent weight of from 150 to 2000 g/eq., wherein said organic compound is selected from the group consisting of OH-functional polybutadienes having a hydroxyl equivalent weight of from 150 to 500 g/eq, OH-functional polyalkylene phthalates, OH-functional polyalkylene isophthalates, OH-functional polyalkylene terephthalates and mixtures thereof; an isocyanate-reactive component comprising at least one aromatic diamine compound which contains at least two aromatic amine groups and has a molecular weight of from 100 to 1,000;