I use Black Dog Leads and Training halters and love them.
I bought the 5 m lead a few months ago and this purchase is a back up one and love that my Bull Terrier X can walk with his off lead gal pal and feel more freedom but I can also give lead cues if needed I also leave it on him when he is in the ocean in case of any crazy dogs running up unasked so I have some control. After a while I have developed a good way to ensure that they don't get tangled - and after watching a great training video from a company called Tenderfoot Training in the USA have taught my guy to "fix it" when the lead is caught in his under carriage - and he learnt pretty quickly to untangle himself in his own way - I am mentioning this as people I meet on walks say tangled long leads are reason they don't get them - like all things it just takes a bit of diligence - I really love having him on a long lead. I also use this brand as it was referred by an amazing trainer that said that these flat leads are the ones that the dog can feel the instructions from .
Love Vet n Pet Direct also
The 5m lead is perfect for my ball mad dog recovering from a broken leg. I can take him to the park for a good sniff around and he can’t take off when he sees someone throwing a ball.
I use this lengthy lead attached to a flotation device. My dog has to swim daily as part of her physio program. I don't have to get in the water with my dog but can successfully lead her around the perimeter of the pool.
We are using the long lead for recall training on our puppy, it's working a treat. Very useful to give him some 'freedom' but to get him back when we need it.