Insulated mailboxes are mailboxes made of insulating material or that have an additional layer of insulation. They are designed to prevent mail that is put in the mailbox from being damaged by cold, heat, or moisture. Insulated mailboxes are often made of steel or aluminum and are designed to be strong and durable. Some insulated mailboxes also have a flap or cover that can be opened to remove the mail from the mailbox. Insulated mailboxes are often used on houses or apartments to prevent mail from being damaged by extreme weather conditions. They can also be used on offices or other buildings to prevent mail from being damaged during transportation or storage.