Opsite Post-Op Transparent Waterproof Dressing with Absorbent Pad. These dressings combine a transparent film dressing with an absorbent dressing pad. They are impermeable to water and body fluids, protecting the skin underneath the dressing and allowing the skin to breathe and preventing moisture build-up. With a low allergy adhesive, these dressings reduce the risk of irritation while keeping the dressing in place. Size: 2-1/2" x 2". 100 dressings/box.