The Dynarex Post-Op Sponge (1200/Case) is a 100% woven cotton sponge, and is sterile, highly absorbent, and packaged as two pieces in a peel down pouch for convenient aseptic handling. These kinds of sponges offer more moisture wicking and absorbency than other single layer sponges. These Post-Op Sponges are ideal for surgical procedures and dialysis.