We bought säker kelp collar, leash and fi mount.
The collar feels lightweight yet sturdy, which is perfect for a puppy who’s still getting used to wearing one. It doesn’t feel bulky or restrictive, and the fit is comfortable without causing any irritation. The fi attachment is a nice as we make sure we track puppy’s sleep and steps.
The leash pairs really well with the collar. It’s strong, easy to grip, and well-balanced, giving good control during walks while still allowing my puppy to explore comfortably. The hardware feels solid and secure, which gives me peace of mind.

I purchased this with the hopes of having a strong adapter that would fit my girls normal collar. This did not disappoint. Yes it was a pain to get on (Its not designed for other brand collars), but that means its not coming off. It is actually makes less/ no noise compared to the original collars.

Great design - watch the install video (seriously). Doesn't rattle and holds the fi unit at the perfect angle for a collar. Pairs perfectly with their biothane collars for a lightweight but sturdy piece of canine technical equipment

I have struggled finding Fi adapters that can be used on a harness. While I did get this adapter to go on the kelp collar, I am noticing that this adapter can be used on virtually any collar or harness that is 1" wide. I love that it is sturdy and has a strong magnet.

The Saker Fi mount is the best mount I have found. I bought several trying to find what works best and this is far and away the best quality, and I have no fear of losing the Fi tracker. Other snap on and 3D printed mounts I purchased are inferior.