If you've always fallen somewhere in between pack sizes, the Thule Women's Guidepost 75 Backpack has you covered with its four way adjustable suspension system. This large, 75 liter pack will get you deep into remote wilderness areas where you can escape the crowds and find pristine mountain views. The TransHub suspension system provides six inches of adjustability in the torso, and you can adjust the width of the shoulder straps to dial in the perfect fit. A cavernous main compartment will easily carry all the gear you need for a weeklong trek and can be accessed either through the top or the large j zip side panels. One of the more unique features on the Guidepost is the detachable top loader, which converts into a 24L summit backpack. A hydration compatible design enables you to fit the pack with your favorite hydration system.