You can use any linens you would normally use on a bed. If you’re using your cot at home, a pillow, sheets, and a comforter are just fine. The same will also work when camping if the weather is too warm for a sleeping bag. Just remember to pack some kind of barrier, such as a fitted sheet, to place between your body and the cot’s sleeping surface or mattress. That way, you’ll protect your investment from sweat.