A Shrink Tunnel is a type of packaging machine used to apply heat to shrink wrap around products in order to form a secure bond. It works by passing the wrapped product through a heated chamber, where the heat shrinks the wrap to the product. The heat can be applied either with hot air or infrared heat, depending on the product and desired effect. The tunnel also has adjustable speed and temperature controls, allowing for precise packaging of a variety of products. Shrink Tunnels are widely used in the food, beverage, and medical industries, as well as many other areas.