It’s been only about a half year since the purchase, and my dog is about 35lb so she does not have crazy amount of pulling force, but where you may hold for extra support during the walk( and the leash is long if you get it for training purpose and to “heel” ) the edge of the leash flayed so terrible. I washed once by hand as instructed when it got dirty with everyday use, and it only made it worse. At this price point I hoped it lasted to look good at least 1-2 years before it starts fall apart, but I guess not. I do see it’s 100 %cotton, so it’s just how it works. Functionality wise it’s amazing and the nylon core is just fine but I really hoped it lasted better. if you have a dog doesn’t pull you at all or less than 20lb and doesn’t need any control or training, or simply just don’t care how much it lasts good looking, go for it. Otherwise I may just get different leash because it’s really sad and not worth if your leash looks like many years old within few months.