A dry bag is a type of flexible container that seals in a watertight manner, typically made of plastic film, plastic-coated fabric, or waterproof fabric. They are often used in outdoor activities such as kayaking, canoeing, rafting, canyoning, skiing, and snowboarding, to protect sensitive items from getting wet. Dry bags are designed to be waterproof, making them suitable for storing anything from electronic devices such as smartphones and cameras to clothing and food supplies. They are also used to prevent sleeping bags and spare clothing from getting wet in a camping context. Dry bags come in various sizes, ranging from small bags large enough for a camera or smartphone to large bags big enough for several sleeping bags and a folded tent. They can be constructed using welding, sewing, or gluing techniques. Dry bags are secured by rolling down or dog-earing the top at least three times, then clipping the buckles together, creating a watertight enclosure. Dry bags can be used to keep wet and dry items separate to prevent moisture damage to clothing or electronics. They can also be used to create extra storage space, isolate dirty or damp clothes, and protect items from water, snow, humidity, dirt, dust, mud, sand, and insects. Dry bags can be equipped with adjustable shoulder straps for practical and comfortable carrying.