The Overberget sling is assembled from two separate straps and connected with a ladderlock buckle. This allows you to quickly tighten the sling against your body if you momentarily need to keep your hands free.
The construction also forms a loop under the shoulder padding that provides a thumbhole where you can rest your hand while stalking in the woods. Especially when carried muzzle down, it is also possible to use the sling as Ching Sling type gun rest. Just place your support hand through the loop and tighten the sling against your elbow.