Smith and Nephew Inc Opsite Post-Op Dressing with Absorbent Pad 4-3/4" x 4", Waterproof, Latex-free -Box of 10 Each. Product is manufacturered and licensed by Smith & Nephew . Product is categorized as a gauze composite - border. HCPCS: A6203 . Smith and Nephew Inc Opsite Post-Op Dressing with Absorbent Pad 4-3/4" x 4", Waterproof, Latex-free. Smith and Nephew Opsite Post-Op Transparent Waterproof Dressing with Absorbent Pad is a revolutionary post-operative dressing combining a high Moisture Vapor Transmission Rate (MVTR) film and the cushioning and absorbency of a low adherent pad together with an easy application carrier system. The hydrophilic polyurethane film on this dressing has Reactic properties that Switch On in the presence of moisture allowing any excess to transpire into the atmosphere. High MVTR. Waterproof film. Bacterial barrier. Latex-Free Formula. Highly-absorbent pad. Low adherence. Conformable. Round Corners / Thin Film.