When choosing a Flexi leash, you should base it on the weight of the dog - it must not exceed the maximum weight indicated on the package.

If the dog has a very quick temper or has not been taught to walk calmly alongside you and the dog constantly pulls, then you should avoid using the Flexi leash.

The Flexi leash is not suitable as a puppy's first leash, because with this leash the puppy will not learn to follow and recognize the owner and may get used to pulling. 

Manufacturer: Flexi-Bogdahn International GmbH