Was looking for a locking leash that would be small enough and light enough to attach to a head harness rather than a collar. Bought 2 of these from a local retailer as I was surprised by just how lightweight they are, it feels like you aren't even holding a leash. Only drawback is there is no swivel so if dogs are wondering the leash will get a little twisted, but it is easy enough to untwist in your hand, and since our use case is for structed walks it hasn't been a problem. Would love a longer version for sniffing walks!