DERMALON monofilament sutures are inert, nonabsorbable, sterile sutures composed of the long-chain aliphatic polymers Nylon 6 and Nylon 6.6. DERMALON monofilament sutures are nonabsorbable nylon surgical sutures and are available dyed blue. The blue color of DERMALON sutures is easier to see for knot placement and removal in areas of dense natural hair where a black suture is less visible.