Parietex™ composite open skirt (PCO OS) mesh provides a new level of control during open ventral hernia repair. It is made with the clinically proven Parietex™ composite open skirt (PCO OS) mesh, which combines Parietex™ 3 dimensional mesh with a resorbable collagen film to limit attachments from the viscera. The Open Skirted (OS) design has increased rigidity for easier handling during implantation in open incisional and ventral hernia repair. The skirted flap on the parietal side of the mesh allows for more easily accessible fixation points in the open approach. The skirt provides an area of fixation protected from the viscera on one side and allows fixation to the abdominal wall without disrupting the collagen film. All of Covidien's Parietex™ products are created from a macroporous polyester material whose properties invite healthy tissue integration and mesh compliance while reducing encapsulation.