OASIS® ULTRA Tri-Layer Matrix is a natural extracellular matrix (ECM) derived from 3 layers of porcine small intestinal submucosa (SIS) technology. The technology provides an intact three-dimensional extracellular matrix which allows for host cell migration. The three-layer construct is designed with surgeons in mind for increased strength, thickness, and durability. These attributes provide handling/flexibility and more fixation options.