It is equipped with ventilation holes located on the bottom and top part of its housing. These holes are a part of an innovative system of air circulation, which speeds up the process of drying and warming of footwear. The use of ventilation holes results in an effective, efficient and rapid exchange of air between the wet interior of the shoe and the space outside. Heating elements inside the dryer?s tips are connected in series through a miniature thermostat controlling the operation of the device. This dryer is great for long-term use.