These backpacks are built tough, and for extreme use. But still weigh relatively little. They are designed to intensive daily use.
Fabric: 500D and 1000D High quality nylon, coated in PU
Plastics: GT NEXUS buckles military standards.
All zippers: YKK 10
Aluminium: 6061 - T6
Smaller backpack is 35 liters.
Larger backpack is 70 liters. And has a back system that can cope with very heavy weights if necessary.
I did not check what the exact weight of my backpacks, but the 35 liters weighs about 1300 grams, and 70 liters about 2500.
Definitely not ultra light weight. My goal was to create a very strong rucksacks, weighing as little as possible.
I believe that what interests the majority of the members here is the 35 liter backpack.
It is designed for fast treking with low weight, and his back system is built so that it barely restricts the movement of the body.