Coloplast Biatain® Soft Alginate Filler 1 x 17-1/2" Rope Sterile, Highly Absorbent, Latex-Free Biatain® Soft Alginate Dressings are made of a unique combination of alginate and carboxymethyl cellulose (CMC) for superior absorption and one-piece removal. Fast gelling effect when in contact with wound exudates and maintains an optimal moist wound environment.