M+M X Fi Dogs
We use and recommend Fi Smart Collars - protect your companion (and your peace of mind) with their live GPS tracking devices.
We're a certified Fi Maker; all of our collars can be adjusted to be Fi-compatible; fitted with end links to attach your Fi tracker. If you don't see the Mongrel + Mode collar you'd like available with Fi end links already, don't hesitate to reach out - we are happy to adapt or customize our pieces to best suit you and your companion. Find out more about Fi Smart Collars here.
Make sure you choose the right Fi device and M+M collar for your companion: Fi Series 3+ is designed for medium sized dogs (or larger) and for any companion that is a size small (or smaller) the Fi Mini will be the best fit, due to the weight and size of the device.

Fi Series 3+
The Fi Series 3+ device is designed to be integrated with the collar design - so you'll want to purchase a collar that has Fi end links (you can browse our current selection below).
Fi Mini
The Fi Mini simply slides over any collar; so you'll want a collar without end links (the device comes with several attachment options that will fit over any collar less than 1.25" wide). You can browse our full selection here. We have just launched a Petite Collection as well; these are lighter in weight but just as heavy in style - browse that collection here.


Our contemporary designs, meticulously handcrafted using luxurious Italian leather paired with Fi's next generation tech including live GPS tracking: seamlessly integrating safety and style.

What's your Fi?

Fi Mini
*Pair it with any collar
(no end links)

*Paired with a Fi-compatible collar (with end links)
Fi Series 3+

New Arrivals


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