Reflective BioThane Fi Collar Band by Mutt Pack
Reflective BioThane® Fi Dog Collar Band (Over Collar)
Reflective BioThane® Fi Dog Collar Band (Over Collar)
BioThane Reflective Fi Band by Mutt Pack
Reflective BioThane® Fi Dog Collar Band (Over Collar)
BioThane Reflective Fi Band by Mutt Pack
Reflective BioThane Fi Collar Band by Mutt Pack
Reflective BioThane® Fi Dog Collar Band (Over Collar)
Reflective BioThane® Fi Dog Collar Band (Over Collar)
BioThane Reflective Fi Band by Mutt Pack
Reflective BioThane® Fi Dog Collar Band (Over Collar)
BioThane Reflective Fi Band by Mutt Pack

Reflective BioThane® Fi Dog Collar Band (Over Collar)

Regular price $59.99

BioThane® Meets the Fi Smart Dog Activity Tracker

When Fi launched their dog activity tracker, they brought unmatched technology to the dog community. The Fi Tracker is perfect for active pups, and we made a collar that pairs perfectly with it. You can choose from a wide variety of colors to build your pup a unique collar that showcases their personality. Every Fi Dog Collar Band comes equipped with genuine Fi end-links. All you have to do is attach your tracker and you're ready to go!

The "Over Collar" version of our Fi collar is designed to reduce stress on the Fi unit itself since the unit sits on top of the collar as opposed to being built in-line with it. It is also available in reflective in a separate listing!

This particular collar features reflective webbing for added safety and visibility during night-time walks.

To charge your unit, we recommend leaving the unit attached to the collar and slipping it into the charging dock. This helps reduce unnecessary wear and tear.

Please note, this collar does not include the actual Fi Smart Dog Activity Tracker. This must be purchased at: You can save $50 on your Fi  with code muttpack50 at checkout, or you can click this link for the discount to be applied automatically:


Why BioThane®?

BioThane® is hands down the perfect material for a Fi collar for many reasons. Firstly, it's extremely easy to clean; warm water and a mild detergent are all you need to remove mud and dirt. It's also fully waterproof and doesn't absorb odor like nylon collars do. The durability and longevity of the material are huge benefits for adventure-loving pups! All of our Fi collars use 1” webbing.


How do I pick my colors?

We have included a reference picture in the slides to show what each part refers to so you can make sure you select the right colors for the right parts. The collar color selection designates the main color. The strap keeper and accent color selection designates the color for the strap keeper and the Fi link holders. For example, in the featured picture, the parts are as follows:

Collar Color: Royal Blue

Strap Keeper and Accent Color: Neon Green

Available colors for reflective include: Red, Orange, Neon Yellow, Neon Green, Royal Blue, Pink, and Black.


What hardware do you use?

We use a combination of stainless steel and nickel plated brass so you never have to worry about rust. The hardware we use is designed to be strong and durable for adventurous pups!

We also offer the option to add grommets to the adjustment holes to add additional reinforcement if your dog is a strong puller. They also add a little style and flair to the look of the collar. 😉 

How do I choose which size collar to get my dog?

For best fit, measure your pup's neck and choose the size where your measurement fits roughly in the middle. If you prefer less overhang, choose a size where your measurement is towards the high end of the collar's range. For example, a 15" neck would fit in the Medium range best and a 22" neck would fit the XL range best. The sizes for our Fi collars are slightly different from our so please keep that in mind.

It is also important to note that this collar uses heavy-duty materials (both the webbing and hardware) and is not recommended for small dogs, or dogs that need a lightweight collar as this adds significant weight. It is up to the customer to decide if this style of collar is appropriate for their dog, though we typically recommend these collars for dogs 35lbs and up.

For dogs that need a lighter-weight Fi compatible collar, we recommend checking out this collar style:


Available Sizes:

Medium: 13-16 inches

Medium/Large: 15-18 inches

Large: 17-20 inches

Large/XL: 19-22 inches

XL: 21-24 inches

XL/XXL: 23-26 inches

XXL: 25-28 inches


Please be sure to double check your pup's collar size!  Ensuring size is the responsibility of the buyer and we do not accept returns or exchanges on products where the wrong size is selected.  It's always best to measure twice just to be sure!


Swapping your Fi Band:

If you need assistance swapping your Fi Band, please refer to the image in the gallery or email us for help! You need to line up the pieces right for the end links to connect with the device. You may need to be firm when pushing it on, but you do not need to use excessive force as this will risk damaging the casing on your device. To see Fi's official instructions, follow this link:


General Safety Tips:

  • Inspect your gear before each use for wear and tear that could cause safety issues.
  • Always make sure you are clipping directly to the d-ring and not the tag ring.
  • Never use a leash or collar for anything other than it’s intended purpose. Misuse of gear can lead to safety issues.
  • Never leave your dog unattended while any gear is being worn. It is also not advised to allow your dog to drag their leash behind them on the ground.
  • It is the buyer’s responsibility to determine what gear is appropriate for their dog’s size, strength, and activity level. Mutt Pack is not liable for any injuries or damage that may occur as a result of use.


Return Policy:

We want you to dig your gear as much as we do! If you don't love your order, you can return any items that are in their original packaging and have not been used or worn within the first two weeks (14 days) of delivery.

Please note, we do not allow returns for any BioThane products as these are all custom-made items.

For custom (all BioThane) products, please reach out if you have any questions before ordering. If you would like to preview a color palette we can assist with that to make sure your design is to your liking. It is also important to note that it is the buyer's responsibility to properly measure their dog. Please verify that you are measuring correctly for the item you are buying as we do not accept returns if the wrong size is ordered. If you have any questions about fit, please reach out before placing an order so we can help you!

International (non-U.S.) orders are also not eligible for returns.

Customer Reviews

Based on 82 reviews
Perfect for Camping!

We got 2 for taking out pups camping and it worked perfectly! The reflective lines were great, the slightest bit of light showed where they were. And the collars held up the whole trip!

Outlasts our Tasmanian Devil

My dog is absolutely insane and ruined her Fi collar within a month. It was faded, dirty and actually falling apart. I chose this collar hoping it would be durable and easily cleaned like it claims. It’s been over 6 months and it’s still in perfect shape and it almost looks brand new when I clean it!!! This is actually my second collar, I bought one for my other dog because I loved it so much. And it’s so cute, which is a plus.

So pretty

I love this collar. I had always like the designs and collars that the Fi collar came in, but they fade so quickly. But the bio thane collar works so well and looks great. Very sturdy as well!

Fits like a glove...

...if I wore gloves. Heck, I don't even wear pants, but I do love this collar! It is bright, clean, smooth and very well made. I'm proud to sport my Mutt Pack collar as the ONLY thing I'll wear! Thanks Mutt Pack! xo canyon

Mighty fine collar

This is a great collar, looks good, easy to clean and strong. It's a well made collar and holds the fi module securely.