Originally: The pack or bundle containing the belongings of a swagman.A camping ground cover, usually made of canvas. It’s a good alternative to a tent if you like to see the stars. It has a foam rubber mattress on which you put your sleeping bag -- after checking the Swag for anything nasty that can kill you. Once inside you can draw up the two zippers, one on either side, and it encloses you and your sleeping bag. It’s very effective in keeping you extra warm and has a flap to go over your head in really bad conditions.