Fi Series 3/3+ BioThane Collar - Brass Layered Design
- Unit price
- /per
Fi Series 3/3+ sits securely on top of the collar band (unit sold separately).
WATERPROOF
STINK PROOF
EASY TO CLEAN
LIFETIME GUARANTEE
The ultimate BioThane® dog collar designed for Fi Series 3 and 3+ GPS trackers. This premium BioThane® collar features a layered design with classic brass hardware, perfectly sized to hold your Fi tracker securely. Fi tracker is not included and must be purchased separately through https://tryfi.com/.
Our Fi Series Brass Layered Collar is handcrafted with genuine BioThane® material and premium solid brass hardware. The layered design creates a secure pocket for your Fi GPS tracker while maintaining a sleek profile. Waterproof, stink-proof, and easy to clean, this collar is built to last through every adventure.
Why you'll love it:
- High quality solid brass hardware
- Layered design specifically for Fi Series 3/3+ trackers
- Layered design allows Fi tracker to sit on top of collar band
- Made from Genuine BioThane® – waterproof, stink-proof, and easy to clean
- Available in multiple widths and sizes
- Customizable with your choice of colors
- Handmade in Oakland by our all-women team
Get the Perfect Fit 🐶
Collar sizing varies by product and is not universal.
Incorrect sizing is the #1 reason for collar returns.
To ensure the best fit, carefully measure your dog's neck or existing collar. Our Collar Sizing Demo is located at the end of the product photos.
Questions about sizing or need a custom size? Contact us before placing your order.
Note sure which collar type to choose? Learn more about our full range of BioThane® dog collars.
Custom BioThane Leashes and all other BioThane gear typically ship within 5-10 business days (this does not include shipping/transit time). Lead times may be longer or shorter depending on order volume.
All orders are shipped via USPS.
Standard Shipping (USPS Ground) is $7.99.
Priority Shipping (USPS Priority) is $12.99.
U.S. Shipping is free for orders over $85.00.
For more information about our Shipping Policies or International Shipping click here.
Returns are accepted within 30 days of the receipt of the item. Items must be in like new/salable condition and in original packaging. All custom BioThane gear is subject to a 15% restocking fee. For more information review our Return Policy.
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FEATURED PET GALLERY
Frequently Asked Questions
Collar sizing is not universal. Different collars we offer have different size range options due to the built in hardware. It is ESSENTIAL that you measure your dog for a collar before placing your order, and read the size chart carefully.
To size your dog for a collar, use a string or a soft tape measure around your dog’s neck where the collar will sit. Add two fingers of breathing room. Choose the size where your dog’s measurement is close to the middle of the size range.
If you have any questions or need a custom collar size, please contact us.
All of our collars are made from Genuine BioThane® - a waterproof, odor proof, and ultra strong coated webbing made in the US. We pair this with solid brass or Duraflex® plastic buckle hardware.
For safety, we don’t recommend leaving any collar on an unsupervised dog.
BioThane® is hypoallergenic and does not absorb dirt or odor, making it a great choice for dogs with sensitive skin. However, every dog and coat type is unique. In some cases, any collar material can contribute to irritation or matting, especially if it’s worn too tightly, left on when wet, or not checked regularly. We recommend inspecting your dog’s neck frequently and ensuring their collar fits comfortably (snug but not tight, with room for two fingers between collar and neck).
Solid brass will not rust, but may develop a natural patina over time. Black‑coated hardware may show cosmetic wear or rust over time, but strength isn’t compromised. To keep your collar looking new for as long as possible, clean frequently (always after a beach trip), and store your collar dry.
Eligible items may be returned within 30 days of receipt for a refund (minus applicable restocking fees) or a store credit. Items must be in new, resalable condition to be eligible for return.
Personalized items (ID Tags and ID Tag Collars), treats, snuffle mats, sale, and pre made items are final sale and are not eligible for return. International orders are final sale and are not eligible for return.
Please view our full return/warranty policy.
Unfortunately, certain chemicals (such as skunk spray or DEET) can penetrate BioThane and damage the material or leave a smell that cannot be removed. If this happens, please contact us. We may be able to offer a discounted replacement.
We offer a Brass Small Dog Collar in a narrower width (⅝”).
Absolutely. For our custom collars you can choose your hardware, width, color (including a Two Tone option, depending on the collar style). Choose our ID Tag Collar to add an integrated custom ID tag to your collar.
We offer two styles of Fi Series 3/3+ Compatible Collars; an Integrated and a Layered design. The Fi tracking unit is not included and must be purchased separately from Fi.
The Fi unit can be taken on and off by opening the magnetic tab at the back of the Fi end link and sliding the unit off or on the metal track.
The Integrated Design is more lightweight and low profile, while the Layered Design may be preferred if you would not like the metal Fi Unit to be in contact with your dog’s neck. The Integrated Design is easier to charge while remaining on the collar, and may provide a slightly better GPS signal due to its direct contact with your dog.
ABOUT US
We are a woman-run team of positive dog reinforcement professionals on a mission to help dogs and their guardians live their best lives together. Our goal is to help enhance the dog-human bond through products that prioritize connection, safety, and comfort over control.
I was looking to upgrade my dogs’ original Fi collars and boy did I. They’re beautiful and turned out exactly like I imagined. Also super durable and easy to clean-both requirements for my high energy/maximum chaos mixed breeds. Highly recommend!
Thank you for taking the time to leave a review! We are thrilled to hear that our Fi Series 3 BioThane Collar exceeded your expectations. We strive to provide both durability and style for our furry friends. It's great to know that your dogs are loving their upgraded collars. Thank you for recommending us to others. Happy adventures!