Medline Industries, INC. Gauze Sponges, Nonsterile, 4 x4, 12 Ply, 200/PK, WhiteNonsterile gauze sponges are ideal for wound dressings, wound packing and general wound care. Each sponge is made of 100 percent woven cotton. Clean, debris-free packing has folded edges to prevent unraveling. Sponges are also packed in a coated paper envelope to reduce fiber debris. Easy-open envelope is carefully sealed to prevent the intrusion of dust and contaminants.