A molding composition containing the following components: I. from 99.9 to 95 parts by weight of a polyetheramide obtained from 1) a linear aliphatic diamine having from 6 to 12 carbon atoms, 2) a linear aliphatic or aromatic dicarboxylic acid having from 6 to 12 carbon atoms, and 3) a polyetherdiamine having at least 3 carbon atoms per ethereal oxygen atom and having a primary amino group at an end of the chain, and II. from 0.1 to 5 parts by weight of a copolymer which contains from 0.8 to 20% by weight of an anhydride or an epoxide in copolymerized form, wherein the total amount of I. and II. is 100 parts by weight, is suitable for the extrusion of flexible pipes, and also for the production of flexible blow-molded articles.