You like to shift up a gear when hiking. Lightweight and compact equipment is a must. The Lithium 20 is made mainly from recycled materials and the durable waterrepellent treatment is PFCfree. The very lightweight and breathable shoulder padding makes it feel very comfortable to carry. Air channels in the 3D EVA foam provide good ventilation. The padded hip belt has a foldout pocket for your smartphone. If you dont need it you can simply remove it. The same applies to the integrated rain cover. The backpack is compatible with hydration systems. The mesh side pockets allow access even when walking. With the Lithium 20 youre traveling in the fast lane in the mountains.