Ethilon suture 4-0, FS-3 needle, 45 cm blue filament Pack of 36 sutures. Non-absorbable - synthetic - monofilament. Ethilon is a nonabsorbable, sterile surgical monofilament suture composed of the long-chain aliphatic polymers Nylon 6 and Nylon 6,6. This gives a very secure knot tying. Ethilon sutures are dyed black or green to enhance visibility in tissue. Manufactured by: Ethicon / Johnson & Johnson