LEM's edible Natural Casings make juicier, tender sausage. They provide a distinctive "pop" when you bite into sausage stuffed in natural casings. These casings should be rinsed in warm water several times, then soaked in water for one hour until soft and pliable. Always refrigerate your natural casings after the bag has been opened. For proper storage, cover casings with salt, place them in an airtight container, and refrigerate them. Properly salted and refrigerated casings should last a year.