ECO 1" Adjustable BioThane Martingale
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ECO 1" Adjustable BioThane Martingale
Description
ECO 1" Adjustable BioThane® Martingale Collar
Maximum Control. Minimal Nonsense.
The ECO BioThane Martingale Collar is built for dogs who need added guidance without sacrificing comfort, flexibility, or durability. Clean in design and highly adaptable, this collar provides controlled feedback without the feel of a full slip—ideal for training, everyday walks, and dogs between sizes.
Made from 1" Adjustable BioThane, the ECO Martingale is waterproof, odor-resistant, and designed to hold up through real-world use in all conditions.
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 the ECO Martingale Works
Martingale Design
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Tightens just enough for improved control
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Prevents backing out without constant pressure
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Great alternative to full slip collars
Extended Fit Range
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Covers more sizes with fewer collars
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Ideal for growing dogs, fosters, and in-between neck sizes
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Perfect for multi-dog households
Premium BioThane Construction
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Made with 1" BioThane
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Waterproof and odor-resistant
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Flexible in cold weather
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Easy to clean—wipe and go
Adjustment Style Options
Choose the setup that best fits your handling preference:
Single Adjust
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Tri-glide adjustment only
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Lighter, rounder profile
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Minimal hardware feel
Dual Adjust
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Tri-glide slide + buckle adjustment
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More fixed positioning
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Ideal for consistent fit
Buckle Options
Select the level of durability that fits your needs:
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DuraPlastic – Lightweight and simple
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ALU-FLEX® – Aluminum-polymer hybrid for strength without bulk
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ALU-MAX® – Full metal for maximum durability
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COBRA® Pro-Style & FM – Professional-grade performance hardware
Size Guide
Measure your dog’s neck snug and add two fingers.
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S: 14"–19"
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M: 16"–21"
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L: 18"–23"
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XL: 20"–25"
The ECO BioThane Martingale Collar is built for handlers, hikers, trainers, and real-world dog life—adaptable, durable, and designed to work when it matters.
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 →Must have.
Thank you so much, I’m really glad the ECO Adjustable BioThane Martingale has been a must-have for you. Appreciate the support!
This is a great collar and seems well-made. I like the small width of the collar and the AirTag holder slipped right on. It matches the leash I bought previously from the seller.
Thank you so much, Andrea! We’re so glad you’re happy with the ECO BioThane Martingale and that the AirTag holder fits perfectly. It’s always wonderful to hear from a returning customer, and we really appreciate your support!
This is the 4th item I have purchased from Bolder K9. All have been well-made and arrived as ordered. I love this Martingale collar because it is easy to put on, well-made and stylish!
Thank you so much, Erin! We’re honored to have your continued support and are thrilled to hear you’re loving the ECO 1' Adjustable BioThane Martingale. It means a lot to know our gear has been a great fit for you every time.
Beautifully made collar. Took quite a while to ship (guessing due to the holidays) but I wouldn't hesitate to buy from this shop again. It's strong enough for my 70lb golden, colors are as described, and looks/feels great.
Thank you so much, Kyra! We’re really glad you’re happy with the ECO 1' Adjustable BioThane Martingale and appreciate your patience with the holiday shipping delay. It means a lot to hear it’s a great fit for your golden, and we truly appreciate your kind words and support.
The martingale collar adjusts easily and the size works really well for my pocket rocket sized GSD. Next time, I would go back to using the Cobra FM buckle (it wasn't initially in the drop down menu, and was added after I had ordered) since the Cobra Pro Style buckle is a bit heavy for my GSD's tiny neck.
Thank you so much, Christine! We’re glad to hear the ECO 1' Adjustable BioThane Martingale fits your pocket rocket GSD well and adjusts easily. We really appreciate you sharing the feedback about the buckle—it’s helpful and means a lot that you took the time to note it.
Best collar ever. Best company ever. Love supporting dogs in need and WA companies!
Thank you so much for the kind words — I’m really glad the ECO Adjustable BioThane Martingale has been such a great fit for you. It means a lot that you’re supporting our small WA business and the rescue work behind it. Appreciate you!
