Durable FR Cotton Blends 88% Cotton /12% Nylon Blends of cotton and nylon are designed to increase abrasion resistance compared to similar woven and knit fabrics. These fabrics are made flame-resistant by application of a flame retardant. COTTON’S COMFORT. NYLON’S DURABILITY. This practical cotton blend provides long-lasting protection for nearly all work environments. Ideal applications include ferrous metals, electrical utilities and the chemical, oil, gas and petrochemical industries. Among similar fabrics produced by the “ammonia cure” process are AMTEX® by Mount Vernon Mills, Inc., Banox Certified® by ITEX, Inc. and INDURA® by Westex, Inc. Click here to learn more about Bulwark Fabric Types.