DermaFilm® Thin Hydrocolloid Dressings. This protective wound dressing is for minor abrasions, closed surgical wounds, superficial pressure ulcers, skin grafts, and donor sites. It maintains a moist wound environment that remains permeable to moisture vapor and oxygen. Along with its superior conformability, DermaFilm® goes on easy, and comes off clean. Size: 4" x 4", Thin. 10/box.