Textile materials having improved elasticity and method for producing same

A method for improving the elasticity of a textile material which comprises impregnating a preshrunk textile material maintained in a relaxed state with a liquid admixture consisting essentially of a polyisocyanate, a polyether diol and a polyether polyol having at least three hydroxyl groups per molecule, said polyether diol and polyether polyol each having a molecular weight of from about 300 to about 12,000 and said polyisocyanate being present in said admixture in an amount sufficient to provide a ratio of isocyanate groups to hydroxyl groups in said admixture of at least about 1.1:1, reacting said polyisocyanate with said polyether diol and polyether polyol to provide a polymeric impregnated textile material and curing said polymeric impregnated textile material.