With the Futura Air Trek 45 + 10 SL, you can also manage long lengths on foot. The VariSlide system allows infinite adjustment to any body size, the movable hip fins can be adjusted with one hand and take on their share of the load and the mesh back system allows air to reach the back. The carrying system of the SL model is slightly shorter. The carrying system is also specially adapted to the female anatomy. The backpack has space for 45 liters of luggage or 10 more if you lift the lid. It also has a large main compartment with a front zip, a separate bottom compartment, elasticated bags on the side and front and additional pockets inside and on the hip fins. And if water-repellent is no longer enough, you can unpack the integrated rain cover.