Calcium Alginate Dressing, _" x 12", 10/pkg, 6 pkg/cs (59480400)Made of fast gelling, high mannuronic acid fibers from calcium alginate, which is extracted and purified from a natural, renewable source seaweed. When exudate comes into contact with the dressing, it forms a hydrophilic gel that remains in intimate contact with the wound surface, helping to create and maintain a moist wound environment.