This is by far the best neck strap I have tested for action cameras and smartphones! I have tested a lot, from the cheapest, plastic, no-name ones, to major third-party brands and the original DJI Osmo neck strap, and they all had smaller (or major...) weaknesses; I could not find any flaw in this one from K&F Concept.* The neck strap itself is constructed of the usual flexible material with a metal core and fits fine.* In addition, there is a chest/back strap for further securing the rig, with quick-release clips so you can easily put it on or remove it (it's not so easy to remove or adjust in other neck straps I have tested).* This neck strap also features a mini "airbag" at the back of its body, which, according to K&F Concept, reduces vibrations. It is of course hard to tell if this super mini air pillow offers anything or not.* The phone holder is also an excellent implementation. Contrary to other neck straps that feature only Magsafe (very easy to bump the phone and drop it), this here features a "double lock", meaning both Magsafe and spring clips, which are also foldable and take less space during transport. And if that wasn't enough, there is even a small lanyard included in the package, which allows you to secure your phone's case (if it has a lanyard hole) to the neck strap itself. It is virtually impossible for the phone to fall from this neck strap with all three features combined! Sadly, that's not the case with other -even more expensive- neck straps...* The central "GoPro" mount on the neck strap can be rotated by 360 degrees, and clicks/locks every 90 degrees so that you can instantly switch from horizontal to vertical mounting.In summary, and after having tested the best neck straps out there, I can easily say I have not found one that was better equipped and implemented than this one. And at 27€ discounted, it is of course more expensive than disposable plastic ones, but still cheaper than brand-name competitors that are not as good, which means it's excellent value too! Absolutely recommended!