Smith & Nephew Opsite™ Flexifex™ Transparent Adhesive Film Dressing 2" x 11 yds, Water-proof Smith & Nephew Opsite™ Flexifex™ Transparent Film Roll is a roll of transparent adhesive film that has been designed to allow easy application of the film to awkward areas of the body and over dressings and tubes. It is waterproof and provides excellent adherence, even while the patient is bathing.