Make any of our collars Fi-compatible with our Fi Snap. Designed to snap onto most collars, you can now turn any rope or 1″ webbing collar into a Fi Series 3/3+ smart collar. The attachment is made from Hypalon and has a stainless snap for extra durability and security while being easy to snap and unsnap the attachment to switch between collars and charge. Attach your Fi S3 and turn any collar into a smart collar.