Lundhags Sternum Strap

"The chest strap from Lundhags is the ideal addition to any backpack and provides additional comfort on longer treks and hikes. This unisex chest strap offers a reliable fixation and prevents the backpack from slipping, so you can fully concentrate on your outdooradventures. No matter which backpack you use, this strap attaches easily and fits all models, regardless of brand"
"Made of robust buckles made of aircraft aluminum, the chest strap is virtually indestructible and guarantees a long service life, even under the most demanding conditions. With a wearing comfort of 4.0, it ensures a comfortable fit, even during intensive activities. Whether on extended trekking tours or relaxed hikesu2013 this chest harness offers the support you need to carry your equipment safely and comfortablyu2013."