Allevyn Heel Classic 10.5cmx13.5cm ~ Singles. Allevyn Heel dressing has been designed for a superior anatomical and comfortable fit to enhance management of wounds on the heel.. One piece shaped construction. Non adhesive. Unique trilaminate construction. Non adherent wound contact layer. Highly absorbent central hydrocellular layer. Waterproof outer film layer. Protective padding. Highly absorbent. In-vitro studies and clinical experience, both demonstrate that as healing progresses, Allevyn dressings can stay in place for up to seven days. This capacity results from a combination of properties:. The perforated wound contact layer allows even viscous exudate to pass into the dressing.. The hydrocellular core of the dressing absorbs and holds liquid in its microscopic structure.. The breathable outer surface of the dressing allows excess moisture to evaporate away from the dressing.. The result is the formation of a wound environment, which allows healing to progress without the need for frequent dressing changes.