Allevyn consists of a layer of soft, hydrophilic polyurethane foam, attached to a pink semipermeable polyurethane film. Although this film is permeable to moisture vapour, it provides an effective barrier to water or wound exudate and also prevents the passage of microorganisms through the back of the dressing When applied to an exuding wound, the dressing will absorb excess fluid but maintain the wound surface in a moist condition providing a micro-environment that is conducive to healing. ALLEVYN Dressings are available in a wide array of shapes, sizes and formats to cope with a wide range of wounds.