Custom Sport Leashes + Long Lines - Medium Dogs (1/2" Width)
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Our original best-selling leash - designed by you, built by us.
WATERPROOF
STINK PROOF
EASY TO CLEAN
LIFETIME GUARANTEE
The ultimate customizable BioThane® dog leash for medium dogs. Whether you need a standard BioThane® leash, a long leash for dogs, or a BioThane® long line for training, this versatile leash is handcrafted to your exact specifications.
Design Your Dream Everyday Leash - Hand Crafted Just for You! Our bestselling Custom Leash is handcrafted to order in our Oakland workshop, built around the details you choose. Choose your leash width, length, color, and hardware type - then add personal touches like a two-tone accent color, a built-in traffic handle for extra control, or a handy D-ring on the handle for clipping keys or a poop bag holder. BioThane® makes your leash lightweight, waterproof, and stink-proof - ready for everyday walks, big adventures, and everything in between. With endless ways to customize, you'll get a leash that's not only durable, but totally your own.
Why you'll love it:
- Custom made to order in your choice of width, length, color, and hardware
- Ultra secure aircraft grade autolocking carabiner hardware
- Optional two-tone accent color at handle and clip end
- Optional built-in traffic handle for quick control
- Optional D-ring on handle for clipping accessories
- Handmade in Oakland by our all-women team. Your custom leash ships in 5 to 10 business days.
Custom BioThane Leashes and all other BioThane gear typically ship within 5-10 business days (this does not include shipping/transit time). Lead times may be longer or shorter depending on order volume.
All orders are shipped via USPS.
Standard Shipping (USPS Ground) is $7.99.
Priority Shipping (USPS Priority) is $12.99.
U.S. Shipping is free for orders over $85.00.
For more information about our Shipping Policies or International Shipping click here.
Returns are accepted within 30 days of the receipt of the item. Items must be in like new/salable condition and in original packaging. All custom BioThane gear is subject to a 15% restocking fee. For more information review our Return Policy.
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FEATURED PET GALLERY
Frequently Asked Questions
Our leashes are handcrafted from BioThane®, a waterproof and stink proof coated webbing made in the US. BioThane is incredibly strong while still being lightweight, doesn’t absorb water, odors, or dirt, and is a cinch to clean, making it an ideal material for dog gear.
Read more →
BioThane® is exceptionally strong for its weight, with a minimum 1,000 lb break strength per inch of width. An intact BioThane leash paired with quality hardware will hold up to even the strongest pullers. That said, BioThane (like any leash material) is not chew‑proof - it’s engineered for tensile force, not teeth. Please don’t leave any dog unattended while wearing a leash. If chewing happens, reach out - we may be able to repair or offer a discounted replacement.
We offer five core leash styles - pick based on your lifestyle and activities:
- Quick Ship Leash - Our classic loop‑handle leash. Ships in 2–5 business days with free returns.
- Custom Leash (Bestseller) - Fully customizable (length, width, colors, hardware, add‑ons). Ships in 3 - 10 business days.
- Simple Hands Free Leash (Customer Favorite) - Lightweight and streamlined, with a convertible handle for hands free use and custom add-ons available. Ships in 3-10 business days.
- Multiway Hands Free + Convertible Leash (Original Bestseller) - Our most versatile design; wear/use 8+ ways (standard, hands free around the waist or crossbody, multiple length options, and more), custom add-on options available. Ships in 3 - 10 business days.
- Drag Line - A leash with no handle for a lightweight “off‑leash” feel. Low‑profile design is less likely to snag; optional D‑ring at the end lets you clip a traffic handle when needed. Ships in 3 - 10 business days.
Quick tip: Not sure where to start? Our Custom Leash and Simple Hands‑Free Leash are the most popular everyday picks.
Leash Width: Choose based on your dog size and preferred leash feel:
- 3/8" - Small dogs (under 30 lb). Light in hand yet strong.
- 1/2" - Small-medium (up to 60 lb) or anyone who prefers a lighter feel.
- 3/4" - Medium-large (60+ lb), strong pullers, or for a more “traditional” leash hand feel.
Leash Length (activity guidance):
- 4 ft : Short car-to-trail transfers or ultra close quarters.
- 6 ft : Standard leash length.
- 8, 10, or 12 ft : Our most popular everyday lengths; give your dog freedom while keeping them safe.
- 15 ft - Perfect for hiking, decompression walks, and recall practice.
- 20 ft - Great for beach trips, camping, and travel - extra room to roam while staying safe.
- 30 ft - Sniffaris, big open fields, SniffSpots, and backyards. Not advised for beginners.
New to long lines? Start with something just a few feet longer than your current leash (e.g., 6 ft → 10 ft), then increase length as you and your dog get comfortable.
Read more about how to choose the right leash for you and your dog →
To clean your leash, soak in warm soapy water, gently clean with a towel or sponge, rinse and dry. Always rinse your leash and hardware with fresh water after a beach trip. Store your gear dry and in an area out of the sun (to reduce UV damage) with good ventilation.
To keep your brass clip working well, periodically clean and then add a few drops of penetrating oil such as WD-40 into the clasp/spring mechanism and open and close multiple times to help clear gunk.
Brass hardware will not rust but may develop a patina over time (can be cleaned/polished); black hardware will show cosmetic wear over time and/or rust if stored wet.
Due to the hundreds of possible color and leash combos, we’re not able to offer a photo preview of every leash color. See color swatches on each product page and find lots of color inspo on our Instagram!
We also offer:
- Color Wheel (physical swatches of each color we currently offer)
- Digital BioThane Colors Guide + Leash Simulator (a free Canva tool to help you design your leash)
All leashes are handcrafted to order; Quick Ship Leashes ship within 2-5 business days and Custom Leashes ship within 5-10 business days. This does not include shipping/transit time.
Production times may be longer after seasonal sales or during times of high order volume.
Eligible items may be returned within 30 days of receipt for a refund (minus applicable restocking fees) or a store credit. Items must be in new, resalable condition to be eligible for return.
Personalized items (ID Tags and ID Tag Collars), treats, snuffle mats, sale, and pre made items are final sale and are not eligible for return. International orders are final sale and are not eligible for return.
Please view our full return/warranty policy.
ABOUT US
We are a woman-run team of positive dog reinforcement professionals on a mission to help dogs and their guardians live their best lives together. Our goal is to help enhance the dog-human bond through products that prioritize connection, safety, and comfort over control.
We ordered a custom 15-foot biothane long line from High Tail Hikes for our puppy, and it’s quickly become one of our most-used pieces of gear.
We use it for recall practice, letting her drag it during play for that “freedom with backup” feeling, and on hikes where we want to give her room to explore without fully unclipping. It’s been a perfect middle ground between a standard leash and true off-leash time.
The biothane has been excellent. It doesn’t absorb water, mud wipes right off, and it hasn’t picked up that gross wet-dog-leash smell. It feels durable but not stiff, and it doesn’t burn your hands the way some long lines can when a young dog decides to test her speed. The hardware feels solid and secure.
What I appreciate most is that it feels thoughtfully made. It’s simple, clean, and does exactly what it’s supposed to do — no gimmicks, just a well-built tool that holds up to real use.
Would absolutely order from High Tail Hikes again.
Thank you so much, Brendan, for such a detailed and thoughtful review — it truly means the world to us. We love how you described it as “freedom with backup,” because that’s exactly what we hope our long lines provide. It’s wonderful to hear that it’s been such a reliable tool for recall practice, play, and hiking with your puppy. (And that teal looks so good on her!)
We’re especially grateful for your kind words about the feel, durability, and simplicity of our gear. We put a lot of care into making pieces that are comfortable, dependable, and built for real-life use, so knowing that comes through is incredibly rewarding. Thank you for trusting us with your pup’s adventures — we can’t wait to make more gear for you in the future!
This is our first Bio Thane and boy do we like it!!! Took our very speedy and "hi energy" Pointer for a sniffarie and he had so much fun with his 30' long line. And, our wrists and hands came back without one friction burn!!! Love the colors!! Easy to roll up and carry, especially with the extra strap for the leash to be packed up - great idea!! So glad we jumped into the water to try Bio Thane. You MAY have a convert from the great old-fashioned horse leather!!!
That is all great to hear! So glad you are enjoying your new HTH BioThane gear! We would be happy to have converted you :) Looks like some enjoyed the sniffarie. Thank you Kathleen!