Each slipper was placed on the foot (directly on the skin) of St. Alexander of Svir overnight. To do this, they opened the coffin which is usually covered with glass.
Slippers should be applied to the place that hurts, slippers are put under the pillow if there is insomnia or headache.
You should not walk on the ground with the slipper. Only apply it to yourself and place under the pillow.