This is my ultimate premium 4 feet, 6 feet or 8 feet - 6mm (0.236 inch) professional dog training slip lead with a snug push button stopper and hand-cut/stitched high-quality Buffalo leather binding, designed and handmade with passion and love by me (Peter) a professional dog trainer and behaviourist.
 
This lead is made from quality, soft, light but strong abrasion-resistant polypropylene multifilament rope braided of 18 strands. I have chosen Polypropylene rope material because it does not stretch, is light and soft, and overall gives me the best experience and precise handling. The material is lightweight, silky, shiny and has a smooth surface. Floatable, does not absorb water and dries very quickly. Non-toxic, and safe for humans and animals. Resistant to mildew and rot. It doesn't get dirty quickly and can be washed at max. 30 degrees.
 
This training lead is 6 mm wide, from my experience one of the most precise and effective widths for handling and communicating with most dogs.   
Lead is suitable for smaller or medium breeds. NOT FOR LARGE BREEDS unless trained and responsive and yielding to lead pressure!
 
This slip lead will not change size while training due to the snug push button stopper-limiter, within the reasonable pressure. 
 
As a professional trainer, I prioritise safety and quality above anything else.
The lead is on both ends carefully welded, then hand stitched, and finally glued and bonded with the premium 1.5mm thick distressed Buffalo leather which is again hand stitched. 
 
Tips from the trainer:
This is an extremely precise and effective tool so please be careful!
This slip lead is designed to communicate with the dog with gentle pressure and release of the pressure. 
The dog must be introduced, conditioned, and trained to yield to gentle lead pressure. 
The dog is not meant and should not pull into this tool!
It is a simple and basic training tool but requires some handling skills. 
Place the lead as high as possible, right behind the ears, and adjust the size on the dog's neck with a stopper to make it snug but comfortable - make sure there is no pressure on the dog's neck so you can fit two fingers underneath.     
To correctly and safely use a slip lead, seek advice from a professional dog trainer. 
 
NEVER LEAVE A SLIP LEAD ON A DOG UNATTENDED!!!
 
THANK YOU!