Deuter AC Lite 15 SL rucksack has been developed mainly for younger outdoor fans and day hikers, looking for a lightweight pack with maximum ventilation and cool styling. The backpack provides increased performance thanks to the Deuter innovative Aircomfort carry system. At the heart of the Aircomfort system is its flexible ultra-lightweight spring steel frame. It is extremely durable, provides stable tension for the airy back mesh and creates the ventilation space between pack and the wearer ́s back for the moist, warm air to dissipate - thus, providing maximum ventilation. In addition, the Aircomfort carry system provides shoulder straps, adjustable sternum straps and waist belt with hip pads to increase the comfort and to secure the fit. The AC Lite series backpack features special compartment in the inside of the backpack to keep your valuables safe and elasticated inner compartment for storing wet/sweaty clothing, water reservoir, etc. A large zipper opening down the full length of the front provides an excellent overview of contents. A cell phone, snacks etc. are easy to access in the stretch mesh side pocket. There is trekking pole attachment, detachable rain cover, clever attachment for glasses on shoulder straps, and docking loops for helmet holder. AC Lite Series products are hydration compatible. As for Deuter SL type, it has been developed specially for female anatomy. Carrying systems are shorter than men ́s and shoulder straps become slimmer towards ends. Hip belt perfectly hug the female anatomy.