3M Tegaderm - Thin Hydrocolloid Dressing is a square film dressing that can be used on superficial wounds, partial thickness ulcers, and donor sites. This wound dressing combines the high absorbency of hydrocolloid materials while being thin and discreet. It protects the wound from outside contaminants, bacteria, and viruses. This Tegaderm dressing can be worn for up to 7 days without lifting off the skin. It measures 4" x 4" and is latex free.