This K&F Concept camera strap is made from nylon climbing rope which has a multicore centre and a webbed surface. Nylon is used for climbing because it stretches so if you fall and this stops you, it will slow you down gradually and cause less injury. This rope is around 11mm in diameter so it doesn't cut into your neck. As a result, a one metre length provides a comfortable strap for a camera and at one metre, a 2kg weight only stretches it by 10cm.
The ends are made from a two-sided piece that is sewn through the ends, forming a loop through which an o-ring is threaded and in order to protect the camera from the metal o-ring, there is a leather flap with a hole through which the camera's strap loop passes as you can see in the photograph.
The o-rings are a little on the large side and I found that the camera could only accommodate one thickness of the wire that the o-rings are made from.
In the event that a once metre strap is too long for you, there is a short leather strap with a hole at both ends through which the climbing rope passes. If you pull a loop through, the leather grips the ends of the loop sufficiently tightly to hold onto it, thereby shortening it to whatever length you find comfortable.
The only thing that loses this product a star is the appearance of the red webbing that covers the strap. It has a white thread that runs along it that appears irregularly and making it look cheap.