Puracol Ultra ECM Collagen Wound DressingsRobust biological dressing with mostly type I collagen, plus other essential proteins Completely bioabsorbable and won't need to be removed from the wound bed Designed to retain the native extracellular matrix structure Derived from porcine peritoneal membrane Puracol Ultra ECM Collagen Wound Dressing in Educational Packaging, Fenestrated, 2" x 2" Puracol Ultra ECM Collagen Wound Dressing in Educational Packaging, 4" x 5" 10 per box ADHESIVE No