Sorbsan Plus SA is a self-adhesive calcium alginate wound dressing. The calcium alginate wound contact layer is bonded to a secondary absorbent layer, which in turn is covered with a flesh-coloured, microporous, thin foam backing. This membrane extends to provide the dressing with a hypoallergenic acrylic adhesive border. The non-woven Sorbsan calcium alginate is high in Mannuronic acid, and low in Guluronic acid. The secondary layer absorbs excess exudate. This combination makes Sorbsan Plus a highly absorbent dressing.