Sleep sack

Sleep sacks are usually required in hostels, and they serve as bed linen, which some hostels do not provide or provide with a charge. A sleep sack is essentially a sleeping bag made from sheets, with a pillowcase attached. They are available direct from Hosteling International and discount travel agencies for about fifteen dollars, but you should skip those and make your own. Perfectly good ones can be made in less than an hour. Just fold a sheet over, sew up the long side and one of the short sides, flip inside out, and sew on a pillowcase - much cheaper than buying one, and a neat reminder of home.