In the past,Thai people used various kinds of herb to cure many symptoms, as herbs have natural qualities of medicine to reduce body aches,sprain muscular aches and cramps. They collected several kinds of herbs in to the fabric bags,steamed it for 15 minutes,and applied on the body. Now the world has changed. For your convenience and to simplify the use, we adapted heat from the microwave oven instead of using the steam as it was done in the ancient day. However , the essence and the competency of the herbs are still remaining as in the ancient day.