Silk surgical suture is a nonabsorbable, sterile, surgical suture composed of an organic protein called fibroin. This protein is derived from the domesticated species Bombyx Mory (B. Mori) of the family Bombycidae. Suture characteristics include; braided wax (refined Paraffin, N.F. or Microcrystalline Wax N.F.) coated black (Hematein dyed) or white (undyed) and twisted uncoated white virgin (undyed), or twisted uncoated white (undyed). Silk surgical suture meets all requirements established by the United States Pharmacopeia (U.S.P.) for nonabsorbable surgical sutures.