Biothane long leash wanted to find a heftier leash with a broader width that would be harder to tangle up in knots. 9k) Sale Price $19. Long lines are perfect for recall training, hiking adventures, nosework and more. Our biothane dog leashes are durable, waterproof, and perfect for training and daily walks. 50 English Slip Lead - Stainless Steel or Solid Brass - Waterproof Leash in Genuine Biothane - 12mm (1/2") width Sep 9, 2015 ยท Biothane leashes come in lots of vibrant colors. Available in multiple colors and a variety of widths. $50. Biothane Long Line Dog Leash 5ft, 10ft, 16ft, 30ft, 50ft PVC Recall Waterproof Dog Leash Beach Swimming Tracking Training Dogs Lead for Pet, Medium and Large Dogs Brand: Loutep 4. A long line is simply a long leash, typically between about 10 and 30 feet long, that attaches to your dog’s harness or collar. Lines are most frequently used in tracking work because they offer the K9 enough mobility to follow a scent while helping to keep a handler nearby and out of direct lines of contact and/or immediate danger. gborqufmjpallezbfesvayvyneutkgqgnzuzooqobarhwsznffxpcwnvlmpqirravnaltfybqivqaxv