Post op waterproof and bacteria proof island dressing combining a high Moisture Vapour Transmission Rate (MVTR) film and the cushioning and absorbency of a low adherent pad together with an easy application carrier system. Waterproof film, dressing can be worn in the shower. Low allergy adhesive. The hydrophilic polyurethane film on OpSite Post-Op has REACTIC* properties that 'switch on' in the presence of moisture allowing any excess to transpire into the atmosphere. *Note the outer dimensions are different to the actual pad size.