Duoderm

A hydrocolloid dressing (Duoderm) is an opaque dressing for wounds. A hydrocolloid dressing is biodegradeable, non-breathable, and adheres to the skin, so no separate taping is needed.

In contact with wound exudate, the polysaccharides and other polymers absorb water and swell, forming a gel which is held within the structure of the adhesive matrix.

The moist conditions produced under the dressing are intended to promote fibrinolysis, angiogenesis and wound healing, without causing softening and breaking down of tissue.

Hydrocolloid dressings are used for pressure ulcers.

(source: en.wikipedia.org)