Backpack For Trekking, Hiking, Excursions, Walks And Montagna.Massima Aeration: The Innovative Construction Of The Fins Of The Lumbar Area And Its Smooth Transition To The Backbone Network, Literally Surround The Wearer And Provide A Comfortable Positioning. The Movable Shoulder Straps "Activefit" Fit Comfortably Through The Automatic Adaptation To The Width And Angle Of The Scapular Area. A Little More Weight You Can Easily Carry With Ergonomic Lumbar Fins With Pull-Forward Adjustment. Comfort During Transport Through The Three-Dimensional Lumbar Padding Similar To The Shape Of The Front Bacino.Tasca To Elastica.Portabastoni Slit Escursione.Due Large Zip Pockets On The Lumbar Fins,