A travel duffle bag is a bag that is usually made of nylon or leather that can be tucked down into a compact size. This type of bag is often used by people who are travelling and want to carry their belongings on their person. These bags are typically designed to carry them on the shoulder or like a backpack. The prices for these bags vary depending on the size, material, and brand. However, most travellers agree that it's essential to purchase a travel duffle bag with quality in mind because you will be using it for many years.