Sage is burned in smudging ceremonies to drive out bad spirits, feelings, or influences, and also to keep bad spirits from entering the area where a ceremony takes place. In Plains nations, the floor of the sweat lodge is frequently covered with sage, and participants rub the leaves on their bodies while in the sweat. Sage is also commonly spread on the ground in a lodge or on an altar where the pipe touches the earth. Some nations wrap their pipes in sage when they are placed in pipe-bundles, as sage purifies objects wrapped in it. Sage wreaths are also placed around the head and wrists of Sundancers.