Ultralight hiking is a practice of making a very deliberate selection of equipment with priority given to weight, performance, volume and multiple use, and only those items that will actually be used are taken. The typical approach is to make a spreadsheet and list every item and the weight and simply add them up. Broad categories are pack and accessories, sleeping gear, shelter, clothing, cooking gear, food, hydration and water purification, navigation, and emergency essentials. Each item is evaluated for maximum performance, weight, and multiple uses. For example, a bandanna can be used for washcloth, towel, pot grabber, water filter, hat, or first aid.