Primer Modified Unna Boot Bandage is a 100% soft, cotton gauze bandage that has been evenly impregnated with a non-hardening, zinc oxide paste. It is used in the ambulatory treatment of venous stasis leg ulcers and lymphatic edema, minor sprains, strains, fractures, thrombophlebitis and skin grafts on burn wounds. This bandage is packaged in a unique, vacuum-sealed pouch.