Deuter Trail 20 SL rucksack has been developed for mountaineers and Via Ferrata climbers that value a backpack that fits close to the body and offers ventilation at the same time. It all has been made possible by the Deuter Aircontact innovative backsystem. The main feature of the backsystem is its flexible steel U-Frame, which transfers the load evenly and effectively. In addition, the shoulder straps, hip belt with Pull-Forward construction, chest strap and load adjustment straps provide secure and perfectly balanced fit. What´s more, the new backsystem guarantees fantastic ventilation, which has been achieved by using special foam cushions within the Aircontact system. To fulfill its specific challenges, Trail backpack provides large zipped side pockets for stowing gear safely, elastic side pockets for fast access, and lid pocket. The flat lid construction allows the head to have enough freedom to move, even with a helmet. There is fast access to deeper lying gear via a two-way zipper in front. The backpack also has stretch inner compartment for storing wet/sweaty clothing, and internal valuables pocket. Other characteristics are removeable rain cover, helmet holder, ice axe attachment, walking pole holder, and compression straps. The Trail backpack is compatible with 3.0 litre drinking system. 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.