Primer Modified Unna Boot Dressing is designed for the ambulatory management of venous stasis leg ulcers. This latex-free gauze bandage is impregnated with a non-hardening paste of zinc oxide. Primer® Unna Boot Dressing is ideal for managing: venous stasis ulcers, lymphatic edema, minor sprains, strains, fractures, thrombophlebitis and skin grafts on burn wounds. Made on non-raveling threadlocked gauze.