A backpack is a versatile and practical bag designed to be carried on the back, supported by two adjustable shoulder straps. Typically made from durable materials like nylon, polyester, or canvas, backpacks come in various sizes and styles to suit different needs—from school and travel to hiking and work. Most backpacks feature multiple compartments and pockets, allowing for organized storage of books, gadgets, clothes, and personal items. Some modern designs include padded sections for laptops, water bottle holders, and even USB charging ports. Lightweight yet spacious, a backpack is an essential everyday companion for students, travelers, and professionals alike.