Why Are Deuter Aircontact X Backpacks so Heavy?

https://mountainsforeverybody.com/why-are-deuter-aircontact-x-backpacks-so-heavy
Deuter has launched three backpacks in its new Aircontact X series. They include Deuter Aircontact X 60+15, Deuter Aircontact X 70+15, and Deuter Aircontact X 80+15.

All of them weigh over 3 kg, more precisely 3.10, 3.18, and 3.37 kg, respectively. So what makes them so heavy? Well, there are some really good reasons for such a weight.
Place to buy:
Deuter: https://tidd.ly/3VtW5hl
Amazon: https://amzn.to/4gxdEWe
CampSaver: https://alnk.to/3ciXgid