Hongo Killer Spray relieves itching, burning, scaling, inflammation and cracking of athlete’s foot. Hongo Killer Spray contains a 20% concentration of the active ingredient Undecylenic Acid (maximum allowed is 25%) and is formulated with Vitamin E and Aloe to help moisturize the skin and avoid cracking. Relieves itching symptoms caused by fungus. For the relief of itching, burning feet. Clinically proven To prevent athlete's foot with daily use.