Coloplast Biatain® Soft Alginate Dressing 2" L x 2"W Square Shape, Sterile Latex-free This dressing is a highly absorbent, fiber-free dressing that forms a soft and protecting gel that is ideal for highly exudating wounds. The unique combination of calcium alginate and carboxymethylcellulose (CMC) forms a cohesive gel ensuring removal in one piece and can absorb up to 18 times its own weight in exudates.