A trolley backpack, also known as a wheeled backpack or rolling backpack, is a type of backpack that includes built-in wheels and a retractable handle, allowing it to be easily rolled along the ground instead of being carried on the back. This design feature differentiates it from a regular backpack, which is meant to be worn on the back and doesn't have wheels or a handle.

Here are some key differences between a trolley backpack and a regular backpack:

Wheels and Handle: The most noticeable difference is the presence of wheels and a retractable handle on a trolley backpack. This allows you to roll the backpack on its wheels instead of carrying it on your back. The handle can be extended or retracted as needed for rolling or carrying.

Carrying Options: A trolley backpack offers versatile carrying options. You can roll it on its wheels when the terrain permits, and switch to wearing it on your back like a regular backpack when necessary. This flexibility is particularly useful in situations where rolling is not feasible or comfortable, such as on stairs or rough surfaces.

Weight Distribution: Due to the inclusion of wheels and a handle, a trolley backpack tends to be slightly heavier than a regular backpack of similar size. The added weight is due to the structural components required to support the rolling mechanism. However, once you switch to rolling mode, the weight is largely borne by the wheels, reducing the strain on your back and shoulders.

Size and Capacity: Trolley backpacks are available in various sizes, similar to regular backpacks. However, the rolling mechanism and handle occupy some space within the backpack, which may slightly reduce the usable capacity compared to a regular backpack of the same exterior dimensions.

Purpose and Functionality: Trolley backpacks are particularly popular among travelers, students, and professionals who need to carry heavy loads over longer distances. The wheels and handle provide convenience and ease of transportation, especially in crowded areas like airports, train stations, or school hallways. Regular backpacks, on the other hand, are more suited for shorter trips, outdoor activities, or situations where you prefer to have your belongings directly on your back.

Ultimately, the choice between a trolley backpack and a regular backpack depends on your specific needs and preferences. Consider factors such as the amount of weight you need to carry, the terrain you'll encounter, and the convenience of rolling versus wearing the backpack on your back.