Each pack contains cubed and dried tempeh. It is raw and oil-free. TW uses no vinegar or other additives. Customers can reconstitute the dry tempeh to regular tempeh by leaving it in a bowl of room temperature water for 20 mins. This re-hydrated tempeh is actively fermenting and must be frozen, pasteurized, or consumed immediately to prevent spoilage. The dried and sealed bag of tempeh bites stays active and delicious for three-months at room temperature. Tempe Wala ferments its tempeh using organic soybeans and rhizopus bacteria.