LEM's Natural Casings make juicier, tender sausage. They provide a disctinctive "pop" when you bite into sausage stuffed in narural casings. These casings should be rinsed in warm water several times, then soaked in water for one hour until soft and pliable. Refrigerate after the bag has been opened. To store, cover casings with salt, place in an air-tight container and refrigerate. Properly salted and refrigerated, casings should last a year. Edible.