An important aspect of dog leashes is their sturdiness. Although rope leashes are quite cheap, they are vulnerable to chewing and fraying and are not amongst the most recommended types of leashes. However, it is considered that a better type of leash is the one made of nylon because this material provides a bit of elasticity which is meant to result in more comfort for the dog. On the other hand, nylon leashes can cause chafe or can cut into the skin of the dog.