Because Taiwan is humid, when it rains or when children sweat during physical education class, when they take off their shoes, their feet smell really bad. I have tried many shoe deodorizers, but there is still no improvement. This time I saw this deodorizer, I bought two bottles at a time. When I received the goods, I couldn’t wait to pour them into my child’s shoes to see if the situation improved. The next day, when the child came back, the odor was indeed much reduced. It’s really a good product! I recommend everyone to try it!