An arch support will not cause harm. However, most feet, including mild degrees of flatfeet, do not need an arch support. Leather or canvas are desirable because of their durability and also because the material breathes. Breathing is important so moisture can evaporate. A lining of cloth may be desirable to assist in moisture absorption and to prevent friction.
Inadequate evaporation can lead to fungus infections and odor problems.
Friction creates blisters. Proper fitting is more important for shoes than it is for any other item of clothing, according to Dr. Schmidt. To ensure a proper fit, a thorough examination is required. The exam should be done with the child in the standing position. When the shape of the foot coincides with the shape of the last, the ball of the foot can be felt at the same location as the ball of the shoe.