A waist bag, also known as a fanny pack, is a small, portable pouch worn around the waist. It typically features an adjustable strap that allows it to be secured comfortably. Waist bags are popular for their convenience, as they keep essentials like keys, wallets, and phones easily accessible while leaving hands free. These bags come in various styles, materials, and sizes, making them suitable for different activities such as hiking, traveling, or casual outings. Many waist bags are designed with multiple compartments for better organization, and some even include features like water resistance or reflective materials for safety during nighttime use.