Fi Series 3/3+ BioThane Collar - Brass Integrated Design
Classic brass design with Fi Series 3/3+ integration (unit sold separately).
WATERPROOF
STINK PROOF
EASY TO CLEAN
LIFETIME GUARANTEE
Fi Compatible BioThane Collar (Brass Integrated Design) - Sleek, Classic, and Made for Adventure
Adventure with peace of mind. Our Fi Compatible BioThane Collar is designed to integrate seamlessly with the Fi Series 3/3+ GPS tracking unit (sold separately), giving you real-time location data, activity insights, and unmatched durability in one sleek package.
Why you’ll love it:
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Integrated design - Fi unit is built directly into the collar for a clean, streamlined look
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Solid brass hardware - rust-proof, durable, and perfect for water-loving dogs
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Made with genuine BioThane® - waterproof, stink-proof, lightweight, and easy to clean after any adventure
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Custom design options - choose from single-color or bold two-tone designs (15+ color options)
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Lifetime guarantee - backed for life against defects in materials or workmanship
The Fi Series 3/3+ unit offers extra-long battery life, GPS + satellite tracking, and health insights. This unit is sold separately at tryfi.com and is not included with the purchase of this collar. With this collar, you get a secure fit, no jingle, and total confidence that your pup is safe - wherever your adventures take you.
Please measure your dog's neck carefully before placing an order for a collar. Check out our collar sizing video for help. We're always happy to help with sizing and we're happy to make your collar in a custom length - just Contact Us!
FEATURED PET GALLERY
Frequently Asked Questions
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.
Customer Reviews
Obsessed with the new collar for my puppy. The quality is great, and I’m excited to have a collar that’s easy to clean. Love all the color options and will likely get more in the future.
Thank you Alyssa! Your pup is adorable!
Our ‘land seal’ loves to get stinky in everything—mud, pond/lake/stream/ocean/brackish water, washed ashore critters, more mud #mudfordays. Our Fi Series 3 BioThane Collar has been a life saver. No more stinky, wet collar that used to not only get disgusting, but that would end up giving him neck rashes/irritations. The Fi Series 3 BioThane Collar wipes right down and still looks as bright and shiney as the day we got it. Thanks HTH!
Oh my! Your 'land seal' sounds adventurous! So glad the Fi Collar is working so well for you (Both!), Thank you Liz!
