Opsite Post-Op Waterproofing Barrier Dressings 6.5 x 5cm 5 It can "switch" in the presence of moisture allowing excess moisture to transpire off. It can be used to dress post-operative wounds, minor cuts, abrasions, lacerations and puncture sites. Highly absorbent pad. Waterproof and bacterial barrier. Highly permeable transparent film backing. Low adherent wound contact layer. Directions Peel off clear plastic backing once dressing is placed on wound. To remove Opsite Post-op, lift one corner and slowly stretch outwards from the pad so the film will lift easily. Ideal for everyday use as can be worn while showering.