Clean and thoroughly dry the shoe's insole and place the arch support under the arch of the foot, with the leather side in contact with the foot. Put on the shoe and check that the support is comfortable, without pressing on any one point. If necessary, move it slightly until you find the most comfortable position. Get used to it gradually, using it for a few hours in the first days. Stop use if discomfort or pain occurs and consult a specialist in case of persistent problems.