What is ellies backpack?

As an AI language model, I do not have any specific information on a person named Ellie's backpack. However, I can provide some general information on backpacks.

A backpack is a sack-like bag worn on the back, usually made of cloth or synthetic materials, and designed for carrying simple or more substantial things in a distributed way across the user's back. They are commonly used to carry school textbooks, travel essentials, camping supplies, and other items.

Backpacks come in various sizes, designs, and shapes, and include features such as compartments, pockets, and zippers. They are also available in several styles and colors to match users' preferences. Some backpacks are specifically designed for outdoor activities such as hiking and camping, while others are geared more toward everyday use or fashion.

People often choose backpacks for their convenience, ease of use, and versatility in carrying various items. They can be worn comfortably for extended periods, distribute weight evenly across the back and shoulders, and leave the hands free to perform other activities.