If you have a large dog that stresses and breaks every collar you get him, then try this Parachute Webbing collar from Ruffin' It. This collar is made from the same tubular webbing used for military parachutes. The tubular webbing means the individual threads are shaped like tubes (as opposed to the flat webbing of most nylon collars) and reinforced from the inside. Woven together, the collar's webbing has a break strength of over 5,000 pounds! now you can keep even the strongest canine companion in check.