Made of soft, durable plastic. Stays hot for at least 30 minutes. Soothes muscles with constant heat. Fits neck and shoulders. Dimensions: 17L x 8W x 1H in.. This Evertone Neck and Shoulder Pad is designed to helps soothe muscles with its constant heat. This heating pad stays hot for at least 30 minutes, ensuring you'll get all the benefits of the heat. Its unique design accommodates over the shoulder and neck area to maximize coverage.