Intense, moist heat with the added convenience of a pre-set switch, so hands are free to continue activities during therapy. Specially blended cover is washable and non-shedding. Generous size (27" by 14") covers entire spine, both shoulders or the length of a leg - making this the most popular size. New Four-Stage Therapy Switch provides optimum 20-minute treatments. Fleece Blend Flannel Cover Included. Also Available with a Manual Switch.