The Back Belt is a wonderful way to pamper yourself after a day of stitching, gardening, or at the gym. You can microwave the belt and let the warm heat therapy penetrate deep into sore, tight muscles. Chill the belt in the freezer and let the cold therapy soothe and cool you down on hot summer days. The back of the belt is filled with grains, sprinkled with cinnamon, clove and eucalyptus for aromatherapy benefits. The back part of the belt measures 16" x 8.5". The waist band is adjustable with a wide Velcro closure. The belt can be adjusted out to 52".