Fruit leathers are restructured fruit made from fresh fruit pulp or a mixture of fruit juice concentrates and other ingredients after a complex operation that involves a dehydration step. Dehydration of fruit leather is a process which involves simultaneous heat and mass transfer. Various methods of drying and drying conditions affecting the quality of fruit leathers have been previously studied. Traditional sun drying allows the production of fruit leather with a live color and translucent appearance. However, the drying time is long and dependent on environmental contamination. Today, the conventional hot-air drying process is still the more common technology which has been used for making fruit leathers with better color and flavor. And researches on hot air drying processes of popular fruit leathers are as follows.