A delivery device and implantable prosthesis for repairing a soft tissue defect such as an abdominal wall hernia. The delivery device includes a support body that is nested between a first and second layer of the prosthesis. The support body includes a zone of weakness to facilitate collapse of the nested delivery device and prosthesis. A handle extends from the support body and may be used to position the prosthesis as well as to cause the support body to move to a reduced configuration for removal of the support body from the prosthesis.
