ECO 1" Adjustable BioThane Martingale

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.
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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.