Mammut Lithium 20 is a small, light and compact trekking backpack perfect for day trips that require little equipment. The shoulder straps are ergonomic, padded and breathable while the back is interspersed with 3D EVA foam padding and hollow channels to ensure excellent breathability. The waist belt allows you to unload the weight of the backpack evenly but if you don't need it you can easily remove it as well as the integrated pocket for your smartphone. Finally, in addition to being compatible with the hydration system, you will find two elasticated mesh pockets on the sides that allow you to have what you need always at hand. Ah, let's not forget the integrated backpack cover as well as having a fabric with DWR treatment! Mammut Lithium 20 trekking backpack