They are prepared from fibers of high molecular weight, long chain, linear polyesters having recurrent aromatic rings as an integral component. Ti-Cron braided sutures are available uncoated or coated uniformly with silicone to increase surface lubricity, thereby enhancing handling characteristics, ease of passage through tissue, and knot run-down properties. Ti-Cron sutures are inert and elicit only minimal local tissue reaction. Ti-Cron sutures are available dyed with D&C Blue No. 6 colorant or undyed (white). Ti-Cron sutures meet all requirements established by the United States Pharmacopeia (USP) and the European Pharmacopeia (EP) for nonabsorbable surgical sutures except where indicated on the individual unit package.