Mechanical support, generally made of fabric that serves to hold the prosthesis in position during its use, is the alternative to medical glue. The harness has a much lower hold than glue but is safer to use. Medical glue often causes sores at the application points due to too intense mechanical stimulation or allergic reactions to the glue components. The harness does not present any of these problems, but it could leave marks on the skin if it is too small. Harnesses are generally made of an elastic band, so they can absorb sweat in the area rather than allowing it to stagnate. Some harnesses are made of rigid synthetic fiber and equipped with a leatherette plate to support the prosthesis; these should be used only during intercourse since they have a much lower absorbency.