Tri-Layer Wound Matrix Dressing OASIS® Ultra Porcine SIS (Small Intestine Submucosa) 1 X 3 InchOASIS Matrix is composed of porcine small intestinalsubmucosa (SIS), a naturally derived scaffold extracellular matrix (EDM) 3 layer matrix Fenestrated 300 microns Three layer structure providing meshed fenestrated layers of naturally derived extracellular matrix (ECM) Offers more material available for weekly visits and challenging wounds with degrading enzymes 5 per box