BioThane® 1.8m Walking Lead | Long Walking Lead NZThe longer everyday lead. 1. 8m of single colour BioThane walking lead for tall handlers and slightly roomier walks. 1. 8m is the length you want if you've ever found yourself crouching on a 1. 2m lead to keep your dog comfortable. For taller handlers (over 175cm), tall dogs, or dogs who naturally walk a stride ahead, the extra length transforms the walking experience without ever crossing into long line territory. Six feet of room. Loop the slack in