The Dual Sternum Strap Adjuster acts as an auxiliary support for the shoulder straps to prevent the backpack from swaying left and right. Generally, after the shoulder straps are adjusted, the position of the chest buckle is basically set automatically, and it is adjusted to be slightly tightened and not suffocated.

The structure of the carrying system of the mountaineering bag includes a shoulder strap, a chest strap, a waist belt, a shoulder strap, a bottom strap, a support device, a ventilation device and an adjustment device (referred to as five belts and three devices). The carrying system is the core of the technological content of the backpack. The biggest difference in the performance of a backpack is the carrying system. The design of the carrying system of a mountaineering bag with good performance not only considers ventilation, but also facilitates gravity transmission, strong load-bearing and comfort.

The ventilation device of the carrying system is an important indicator of carrying comfort. Manufacturers usually use soft ventilation materials to bulge, the shoulders are designed as shaped cushions, and an adjustable breathable cushion is installed at the waist fulcrum, so that the back forms a saddle vertically and horizontally, thereby Good ventilation.