Monosof and Dermalon monofilament nylon sutures are use in general soft tissue approximation and/or ligation, including use in cardiovascular, ophthalmic, and neurological surgery. Monosof and Dermalon monofilament sutures are inert, nonabsorbable, sterile sutures composed of the long-chain aliphatic polymers Nylon 6 and Nylon 6.6. The braided sutures are coated uniformly with silicone to enhance handling characteristics, ease of passage through tissue and reduction of capillarity. Monosof monofilament sutures are nonabsorbable nylon surgical sutures which are available either dyed black, with Logwood extract, or undyed (clear). Dermalon monofilament sutures are nonabsorbable nylon surgical sutures and are available dyed blue. .