* Wear it without the O-ring if your fur baby isn t a calm walker, and use the O-ring indoors so you can use it safely.

* If the O-ring spring becomes loose depending on the frequency of use, be sure to replace it with a new ring.  (It is recommended to replace it once every six months if used daily)

* For safety reasons, we use a thick ring. If the leash buckle is narrow, there s. a danger of it opening, so make sure to use a leash buckle big enough for the O-ring.

* The O-ring enables you to adjust the length as shown below.