Our Chromic Catgut suture is an absorbable, sterile, surgical suture composed of highly purified connective tissue (mostly collagen) derived from either beef or sheep intestines. Chromic Catgut is treated with chromium salt solution to resist body enzymes, thereby prolonging the absorption time to over 90 days. The pure collagen ribbons are submerged into chromic solutions, then electronically spun and purified into evenly chromicized strands of Catgut. This chromic covering not only prolongs the strand's integrity, but also minimizes tissue irritation, causing less internal reaction. The percentage of collagen in the catgut suture often determines the quality of the suture. Higher percentages of collagen allow for: superior tensile strength, longer absorption times, and lower reactions in vivo.