A briefcase is a structured, flat, rectangular bag used primarily for carrying documents, laptops, and other essentials in professional settings. Traditionally made from leather, modern briefcases also come in materials like nylon, polyester, and aluminum, catering to various needs and styles. Designed for business professionals, lawyers, and executives, a briefcase offers organization and security for important items. Most models include multiple compartments, such as padded laptop sleeves, zippered pockets, and slots for pens, business cards, and chargers. Some hard-shell briefcases provide additional protection against impact, making them ideal for delicate equipment or confidential files.