Do wheat bags expire?

Do wheat bags expire? Generally speaking if you heat a Wheat Bag once a week it should last a minimum of 7 years. If you heat it several times a day every day you may only get 6 months use from the product.

Generally speaking if you heat a Wheat Bag once a week it should last a minimum of 7 years. If you heat it several times a day every day you may only get 6 months use from the product.