Insulated boxcars provide additional protection from extreme temperatures during transit. Plug doors are designed to supply a watertight seal and better temperature control inside the car. These boxcars are insulated to protect from extreme heat during the summer months and extreme cold during the winter months. They can also be configured with various interior loading devices.
These boxcars are typically used for products that require stringent temperature control during transit, such as wine, cheese, beverages, and other food products. However, they can be used for freight of all kinds.