When it comes to long distance hiking The comfort of our backpack is just as important as a good pair of hiking boots and the Atmos AG 50 backpack is the best Osprey backpack built for multi-day or overnight adventures. Multiple adjustments move padded shoulder straps up and down the spacer mesh rear frame for a precise fit , providing ventilation and soft support right there where we want. Padded Fit-on-the-Fly waist belt allows us to buckle up fasten and move without problems thanks to many micro-adjustments.