Silicone strap, smooth and strong.
The strap is fitted with a metal tube that makes it move more freely. It does not grip the springbar, thus avoiding release.
The end of the strap has a ”bulb” to stop the loop from slipping over the edge.
The first loop is held in place by two small hooks.
On the inside of the strap there are groves that have two functions:
1: The strap is ”aired” and becomes cooler.
2: They act ct as guides when you need to shorten the strap.