Ethicon Plain Gut Absorbable Monofilament Suture 18" 3-0 with X-1 Reverse Cutting NeedleSurgical gut suture is an absorbable, sterile surgical suture composed of purified connective tissue (mostly collagen) derived from either the serosal layer of beef (bovine) or the submucosal fibrous layer of sheep (ovine) intestines. Surgical gut suture is indicated for use in general soft tissue approximation and or ligation, including use in ophthalmic procedures, but not for use in cardiovascular and neurological tissues. X 1 Reverse Cutting