The secret of its training effect lies in the inside prongs that replicate the shape of a dog's teeth. When the dog jerks the leash, the prongs "bite" the dog, thus, he receives the signal of his inappropriate behavior. The influence of the collar is not aggressive, vice versa maximally approached to the natural one.
The tool is made of curogan, the material which has a lot of advantages. Firstly, it is non-allergenic and safe even for the dog with sensitive skin. The possibility of fur discoloration is minimized due to the absence of nickel in curogan. It is not likely to corrode, even under the influence of wetness. It is a strong metal with high breaking load. Besides, it is equipped with a special click lock buckle that doesn't let the collar be unfastened at the most unexpected moment. So you may rely on the long lifespan and the great reliability of the product.