Optifoam Sacrum Adhesive Foam DressingsOptifoam sacrum is highly absorbent to help reduce frequency of dressing changes and manage even heavily draining wounds Waterproof outer layer helps keep out bacteria and prevent strike through; also helps resist roll up for longer wear Dressings that have an "EP" at the end of the item number are supplied in Educational Packaging that focuses on patient safety and correct product application Optifoam Sacrum Adhesive Foam Wound Dressing, 6. 1" x 5.