Fi-Compatible Martingale Dog Collars: Handmade, Personalized and Escape-Resistant

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Mimi Green's Smart Safety for Dog Owners

Practical functionality, comfort and designer styling combine in our Fi-compatible martingale collars. Whether your pup is a puller or a wiggler, the secure martingale design lets you maintain gentle control, and integrated high-tech end links keep your Fi attachment secure — perfect for surprise zoomies. Explore the features of our Fi martingale collars:

• Seamless Fi integration: Mimi Green's Fi-compatible martingale collars integrate Fi end links you select for your device — so if you're shopping for a Fi Series 3 martingale collar, choose the Series 3/3+ end links for a secure attachment that keeps your tracker in place through any adventures.
• Reliable no-slip control: Our martingale collar design gently tightens when needed to prevent backing out, giving you no-slip control for pullers and escape artists.
• Built for safety and longevity: Handcrafted in the USA with nylon webbing and reinforced construction, these collars can withstand over 3,100 pounds of pressure.
• Personalization for faster reunions: An engraved buckle or nameplate ensures your pup always wears visible ID.
• Materials for every lifestyle: Waterproof BioThane®, soft leather, reflective options, velvet, canvas or glitter let you choose the best match for your pup.
• Convenience: Quick-release options and easy-to-clean materials allow you to charge Fi without removing the device (where the model allows).

At a Glance — Benefits of Our Fi-Compatible Martingale Dog Collars

• No-slip control: Our martingale designs tighten gently under tension to prevent backing out — perfect for training and flight-risk pups.
• Seamless Fi integration: Our dog collars feature secure, authentic Fi end links so you won't need extra bands or DIY hacks to hold your Fi device securely in place.
• Built to last: We craft collars from heavy-duty nylon and other durable materials using reinforced stitching and premium hardware.
• Personalized for safety: You can add your name and phone number on an engraved buckle or nameplate.
• Tailor-made for your pup: We craft martingale collars from a wide selection of materials in various widths — perfect for gentle giants.

How to Order a Personalized Martingale Collar With Fi End Links

At Mimi Green, we know that every dog and dog owner is unique — that's why we craft made-to-order collars that are durable, fit comfortably and delightfully fashion-forward. Follow these four steps to select the perfect Fi-compatible martingale collar for your pup:

1. Choose the Material

Shop by lifestyle when choosing the best material for your pup. Each material can be selected in multiple colors and patterns, so whether your dog is an outdoor adventurer or a committed couch potato, they can be runway-ready on every outing. We offer:

• Waterproof BioThane®: Low-maintenance, odor-resistant and perfect for swimming and muddy play
• Nylon:Tough, washable and a reliable everyday choice
• Leather: Soft, with a refined feel offering long-term durability
• Reflective: Extra visibility for night walks
• Designer fabrics: Style that doesn't sacrifice strength — our collection includes velvet, canvas, glitter and flannel options

2. Personalize Your Collar

Add an extra layer of security to keep your dog safe with sleek personalization options that don't snag or jingle like tags. Choose from:

• Engraved buckles
• Engraved nameplates
• Hand embroidery

3. Tell Us Which Fi Series You Have

Each of our collars is fitted with end links that are compatible with your Series 3 or Series 3+ Fi device.

4. Find the Perfect Fit

Using a soft measuring tape, measure your dog's neck at the base. A martingale should fit snugly at its tightest point without restricting breathing. The Fi device is included in the overall fit. If you're between sizes, choose the larger one. All sizes include the actual device in the measurement, as it is based on neck size.

Style Meets Safety: Shop Our Fi-Compatible Martingale Dog Collars

Family-owned and operated since 2007, we offer premium materials and comfortable styling that combines functionality and chic style. Browse our selection of options and express your dog's unique personality with hundreds of customizable patterns, colors and hardware options. Sign up for our weekly doggy deal emails and keep your pup paw-sitively secure and stylish for less!