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 DonationEvery 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 Tightens just enough for improved control Prevents backing out without constant pressure Great alternative to full slip collars Extended Fit Range Covers more sizes with fewer collars Ideal for growing dogs, fosters, and in-between neck sizes Perfect for multi-dog households Premium BioThane Construction Made with 1" BioThane Waterproof and odor-resistant Flexible in cold weather Easy to clean—wipe and go Adjustment Style Options Choose the setup that best fits your handling preference: Single Adjust Tri-glide adjustment only Lighter, rounder profile Minimal hardware feel Dual Adjust Tri-glide slide + buckle adjustment More fixed positioning Ideal for consistent fit Buckle Options Select the level of durability that fits your needs: DuraPlastic – Lightweight and simple ALU-FLEX® – Aluminum-polymer hybrid for strength without bulk ALU-MAX® – Full metal for maximum durability COBRA® Pro-Style & FM – Professional-grade performance hardware Size Guide Measure your dog’s neck snug and add two fingers. S: 14"–19" M: 16"–21" L: 18"–23" 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.
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