The Grafco 4507-1 is a dependable electric heating pad designed to provide comforting relief for sore, aching muscles and joints. It features a unique moisture-holding sponge insert that delivers deep-penetrating moist heat, though it can also be used for dry heat therapy. With three automatically controlled heat settings and a wetproof construction, this pad is recommended for sports injuries, strains, and temporary arthritic pain. The soft outer cover is removable and machine-washable for easy hygiene maintenance.