The Lithium 20 is made mainly from recycled materials and the durable water-repellent finish is PFC-free. The lightweight and breathable shoulder padding ensures a high level of comfort. Air channels in the 3D EVA foam ensure good cooling on the back. The padded hip belt has a fold-out pocket for your smartphone. When you don't need it, simply remove it. The same goes for the integrated rain cover. The rucksack is compatible with hydration systems. The side mesh pockets are also easily accessible while walking. With the Lithium 20, you are in the fast lane in the mountains.