Collagen casings is fabricated from collagen, which is obtained from the curium layer of selected split cattle hides. The collagen-rich tissue is homogenized under high pressure, ring-extruded (hose-shaped) and hardened and results in a mechanically strong casing.Collagen casings are permeable for smoke and water vapour. As collagen is an animal tissue fit for human consumption, the thin collagen casings are easy to chew and “edible”. They are an alternative to replace natural sheep, goat or thin pig casings.The advantages of collagen casings are their standard diameter and strength and that they can be “shirred” i.e. folded together, in long lengths and used for manual or automatic filling stations without pre-soaking in water.