These mushrooms are very popular in Asian cooking for their taste and health benefits. These mushrooms are grown on Natural Oak then harvested, sliced and Naturally Air Dried with no chemicals or pesticides used in the growing or drying process. These mushrooms will keep indefinitely in your freezer so they are easy to keep on hand. If stored in your cupboard, in an air tight container or bag, they will keep their freshness for about two years. They are like little sponges and will soak up moisture and flavors from the air. Use in soups, stews, stir-fries, or braised dishes.