My dog found his love for water when we were using a nylon long line and let me just tell you, it stank sooo bad! Because of course he wasn't picky if it was literal muck or not. So so glad I finally decided to get biothane and I had been wanting one from High Tail Hikes for the longest time because a locking carabiner is super important to me and they were one of the only ones I found that had them on their long lines. I got the 20 foot and it's perfect. Can't wait to get the 50 foot for more recall practice and fetch in on leash areas. No stink, no wet and soggy leash, and comfort knowing the latch can't break. From an adventure loving aussie who loves to muck about, and an owner who likes to let their dog explore safely, we love this business!