Handmade microwavable heating pad is filled with rice. It can be heated in the microwave, or cooled in the freezer. Durable, thick fabric. Compartment seams keep rice and heat evenly distributed. Moist comforting heat. Cold pack maintains coolness. Use rice bag for heat therapy, headache ice pack, and many other aches and pains. Comes with a washable bag to extend the life of the product.