Polymer membranes of varying thickness coated on one side with an adhesive. They are impermeable to liquid, water and bacteria but permeable to moisture vapor and atmospheric gases. Transparency allows visualization of the wound. Indicated for partial-thickness wounds with little or no exudate, wounds with necrosis, and as both a primary or secondary dressing. Also used to cover I.V. sites, donor sites, lacerations, abrasions and second-degree burns. Available in a wide variety of sizes, both sterile and in bulk.