Adjustable BioThane® Martingale Dog Collar
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Adjustable BioThane® Martingale Dog Collar
Description
Adjustable BioThane® Martingale Dog Collar
Secure Control with a Refined, Classic Look
The Adjustable BioThane Martingale Dog Collar blends everyday reliability with elevated style. Designed for dogs who benefit from gentle, controlled feedback without the feel of a full slip collar, this martingale offers security, comfort, and customization in one clean design.
Crafted from 1" Beta BioThane, this collar is waterproof, odor-resistant, and easy to maintain—built to handle daily walks, training sessions, and outdoor adventures with ease.
Beyond the Donation
Every Bolder K9 purchase supports our Beyond the Donation program, where we go beyond traditional giving by combining financial support with hands-on volunteer work for dogs and their people.
Learn more →
Why This Martingale Works
Classic Martingale Design
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Provides added control without constant pressure
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Helps prevent backing out of the collar
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Ideal for training, walking, and dogs who slip standard collars
Premium BioThane Construction
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Made with 1" Beta BioThane
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Waterproof and odor-resistant
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Soft, flexible, and comfortable for daily wear
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Easy to clean and low maintenance
Stainless Steel Chain Options
Each collar features a stainless steel martingale chain, available in the following finishes:
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Black
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Rose Gold
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Gold
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Rainbow
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Silver
Adjustable, Custom Fit
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Adjustable design for comfort and security
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Ideal for growing dogs or multi-dog households
Custom size ranges are available upon request.
Color Customization
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Primary Color: Main collar body
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Secondary Color: Adjustable BioThane end
Sizing
Please refer to our sizing infographic to ensure the best fit.
👉 Measure your dog’s neck snug and allow room for two fingers.
The Adjustable BioThane Martingale Dog Collar is a dependable, stylish solution for handlers who want control, comfort, and a timeless look—built to perform without sacrificing aesthetics.
Return Policies
We're dedicated and committed to our craft, as well as our customer service.
You can cancel your order within 24 hours of placement without additional charges, as long as the order has not been made, packaged or shipped. After 24 hours, we do not accept cancellations. If you believe you have extenuating circumstances, please contact us as soon as possible at info@bolderk9.com.
We do not offer refunds or free replacements for accidental damage such as chewing or wear and tear. We do offer replacements for any defects to materials. We do offer exchanges on our harnesses.
PRODUCTION TIMELINES
Every order is handcrafted to order in Washington. Timelines vary depending on complexity and customization.
Find the Right Gear
SIZE & FIT
Not Sure What Size Is Right?
From collars and leashes to tug toys, our sizing guides help you choose the right fit the first time.
Frequently Asked Questions
Everything you need to know about our handmade BioThane® gear, production timelines, shipping, care, sizing, and custom orders.
How do I care for my BioThane® gear? +
BioThane® is waterproof, odor-resistant, and easy to maintain. Most dirt wipes off with warm water and mild soap. For heavier messes, soak in diluted oxiclean (unscented), then rinse and dry thoroughly. We recommend avoiding prolonged exposure to strong DEET-based insect repellents, which may affect the coating over time.
What if my dog chews through an item? +
Our gear is designed for durability, but no product is chew-proof. Damage caused by chewing is not covered under warranty. If something happens unexpectedly, reach out — we’re always happy to review the situation and see what options may be available.
What is considered normal wear and tear? +
Normal wear includes cosmetic signs of use such as minor scuffs, scratches, fading, or coating wear on hardware over time. Black hardware may naturally show silver underneath with regular use — this is expected and cosmetic only. Wear from chewing, misuse, improper storage, or unsafe restraint is not covered.
How much is shipping and how long will my order take? +
Our production time for most orders is 2-3 weeks unless otherwise specified. Once shipped, delivery typically takes 1–5 business days depending on location. Shipping rates are calculated at checkout, with free shipping available on orders over $75. Need it sooner? We also offer expedited processing options when available.
How are your products packaged? +
Orders are packaged simply and intentionally to protect your gear while minimizing waste. We focus on practical packaging that gets your order safely to you — nothing excessive.
Do you offer returns or exchanges? +
Because most items are handmade to order, we generally do not accept returns on custom gear. If there is a sizing issue, please contact us — we’ll always do our best to help find a solution. If there is an issue with workmanship or a mistake on our end, we’ll make it right.
Can I cancel my order? +
Orders may be canceled within 24 hours of purchase. After that, production may already be underway and cancellations are no longer guaranteed.
Do you offer wholesale pricing? +
Yes. We work with select retailers, trainers, and partners who align with our brand and values. Contact us for more information about wholesale opportunities.
How do I choose the right size? +
Visit our sizing guide page to learn more about sizing. If you’re between sizes or unsure, reach out before ordering — we’re happy to help you choose the best fit for your dog.
Can BioThane® get wet? +
Yes — BioThane® is fully waterproof and made for muddy trails, rainy walks, dock diving, and everyday adventure. It won’t absorb water, hold odor, or stay soggy like traditional materials.
Still Need Help?
Not sure what size, style, or product is right for your dog? Reach out before ordering and we’ll help you get it right.
Contact Us →It's really good quality and it supports a great cause but I'm a bit disappointed that my "primary color"(teal) is hardly visible due to my dog being a small on the last hole so the "secondary color" (black) almost completely covers it up😔. Consider switching them if you're ordering for a smaller pup.
Thanks so much for your thoughtful review! I’m really glad you’re happy with the quality of the Adjustable BioThane Martingale Dog Collar and appreciate you supporting the mission behind the shop as well. I understand the color layout wasn’t quite what you expected for your pup’s size, and I truly appreciate you sharing that feedback!
Really nice quality collar
Thank you so much, Bigel! I’m glad to hear you’re happy with the quality of the Adjustable BioThane Martingale Dog Collar. I really appreciate you taking the time to leave a review.
Absolutely love my custom martingale biothane collar! It’s perfect for my dog & I love the colors. The adjustable options make it perfect to fit my puppy for a while not just a few months! I have a leash from them as well that I’m very pleased with. Will be ordering more :)
Thank you Graci, I’m so glad the Adjustable BioThane Martingale turned out just right for your pup. The color combo and adjustability make it such a fun piece of gear to grow with, and it means a lot that you’re happy with your leash as well. I really appreciate the support and would love to make more for you anytime!
Really nice quality collar. I recently purchased a biothane leash and love it so much I ordered a collar in the same material. The colors are beautiful and it’s very well made. Price is very good and item shipped on time. Would definitely recommend.
Thank you so much, Patricia! We’re glad to hear the Adjustable BioThane Martingale matched the quality you loved in your leash and that the colors and craftsmanship stood out. We truly appreciate the recommendation and your continued support.
The colllar looks as described
Thanks so much for your review! I’m glad to hear the Adjustable BioThane Martingale Dog Collar arrived just as described. Really appreciate your support!
I got this for my dog as his first "professional" collar and already planning on a matching leash. The quality is incredible ontop of it was shipped in a week even faster than I expected. The collar is way more pretty then I even imagined and I will definitely be ordering again
Great collar! Looks just like photo and seems plenty durable to take on hikes with my 80lb dog. Will definitely order from BoulderK9 again.
The collar exceeded my expectations. It looks fabulous in my dog and I love the rainbow hardware especially. I am giving it 5+ stars. My phone couldn’t get the first star to work.
Well made, lovely colors, works well
Well made, great colors, works well
Can't express how happy we have been with everything we have gotten from Bolderk9. The quality and attention to detail is fantastic, and the customer service couldn't be better! We will continue to buy our gear from them for sure! Thank you!
Thank you for your kind words and continued support! We are thrilled to hear that you are happy with our gear and customer service. We strive to provide top-notch quality and service to all of our customers. We look forward to serving you again in the future. Thank you for choosing BolderK9!
This is my 3rd collar I have ordered from bolderk9 and I am still so impressed by the quality and attention to detail! The biothane they use feels high quality than other biothane I have gotten in the past. It’s very supple and clean looking. Very fast shipping and clear communication!
I really like this collar. It’s simple, sturdy, and easy to clean. It is not anything revolutionary, but the Biothane feels like a nice upgrade from fabric and works well with different leashes and harness setups.
Thanks so much for your thoughtful review, Rurik! We're glad to hear the Adjustable BioThane® Martingale Dog Collar has been a durable, easy-to-clean upgrade and fits seamlessly into your setup. We truly appreciate your support and hope it serves you and your dog well for years to come!
I love biothane collars and leashes for dogs. This product is extremely high quality and is great for active dogs, or really any dog! It is great looking, durable, and functional.
Thanks so much for your thoughtful review! I’m thrilled to hear you’re loving the Adjustable BioThane Martingale Dog Collar and that the quality, durability, and functionality stood out right away. It truly means a lot to hear it’s working so well for your active dog and that you appreciate the benefits of handmade waterproof BioThane dog gear!
Amazing quality, amazing company. As a mom to a fat neck pup, I loveee thats it’s a martingale with an adjustable buckle. Safety and functionality without sacrificing style.
Thanks so much, Kylie! I’m so glad the Adjustable BioThane Martingale Dog Collar is a great fit for your pup and that you’re loving the mix of safety, function, and style. I really appreciate your support!
I love this collar. My dog typically breakout under her collar and it has been much better since using the biothane! Love the colors, the fit is perfect and it feels safe and secure.
Thanks so much for the kind words! I’m glad the Adjustable BioThane Martingale Dog Collar has been a better, more secure fit for your pup and that you’re loving the colors too. Really appreciate your support!
Its nice, the only thing i wish was there being more holes on the adjustable part as my dog is right in between sizes.
Thank you so much for your feedback! I’m glad to hear you like the Adjustable BioThane Martingale Dog Collar, and I appreciate you mentioning the sizing detail—dogs in between sizes can definitely be tricky. Thanks again for taking the time to share your experience.
Wasn't going to say anything but I keep getting spammed so here it goes,
Ordered a custom martingale collar and about a week later I get an email saying they didn't have that in stock so they substituted that part for another and refunded the difference. It wasnt even a "hey were out, we have x y and z though would you like to substitute?" Nah it was "we didnt have it in stock so were sending you this instead" within 10 minutes I got an email saying it had shipped before I got the chance to even say anything. WHO DOES THAT?
It was as described. The colors t
Thank you for your review! I’m glad the Adjustable BioThane Martingale Dog Collar arrived as described and met your expectations. I really appreciate you taking the time to share your experience.
i love the collar, and so does my dog! it’s such nice quality, came on time, and is exactly what i asked for! i highly reccomend for anyone who’s considering a new collar, and i already ordered a matching leash! when i reached out to the seller for a question about the leash, they responded quickly and answered my question throughly. i love this shop and they’re definitely getting reccomended to all my friends! thank you boulderk9!!
Thank you so much, Payton! We’re thrilled to hear you and your dog are loving the Adjustable BioThane Martingale Dog Collar and that everything turned out exactly as you hoped. It truly means a lot to hear your kind words, and we really appreciate the recommendations and your support.
This collar is amazing quality and the 2nd one ive ordered
Thank you so much, Ashli! We’re thrilled to hear you loved the quality of the Adjustable BioThane Martingale enough to order a second one. We truly appreciate your continued support and trust in our gear.
All 3 of the collars took about 3 weeks total to be custom made and the shipment time was a few days. I was very happy to see them all fit my dogs and am excited for the walks and training to come.
Thank you for your positive review! We're glad to hear that the Adjustable BioThane® Martingale exceeded your expectations in terms of weight and durability. Our team takes great pride in crafting high-quality products that are perfect for walks and training sessions. Thank you for choosing us for your furry friends' needs. Happy walking and training!
Great collar for our 85lbs lab!
Thank you so much, Anthony! We’re happy to hear the Adjustable BioThane Martingale Dog Collar is working great for your lab. We really appreciate you taking the time to share and for supporting our shop.
Cute perfect color
