These lines are just super quality! We have these lines for years in use. But as we race dogs (Huskies) we replace them so every 3 - 4 months for safety reasons, we just want to "lose" any dog. Although this would probably not necessary. Our dogs are led by us to the body with a climbing harness or hip belt (which are sometimes 6 Flexi leashes at HMS carabiners on man / woman!) And what must withstand these lines to train and force and beatings is disgusting! Even when wet no problem. Only in severe sub-zero temperatures and snow contact, it may be that the lines freezing and retrieving is somewhat stricter. But that's not a negative thing for the linen, that happens with all equipment at these temperatures .. we can not afford it, "lose" dogs. It is perhaps in a few decades - occurred twice that Anmachung retreating or even the linen is torn in the middle. We have received from Flexi behaviourless replacement at no cost. I can only recommend this linen!