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.- Calcium Alginate Dressing, 2" x 2", 10/pkg, 10 pkg/cs (US Only) Stock Item