Constructed using TriShield Micro Rip Fabric, the Eclipse packs offer the ultimate strength to weight ratio, and The Adaptive Fit Harness gives exceptional stability and load carrying comfort, as well as a precise fit. It's designed to do everything you do, with a breathable molded back panel for comfort under moderate (up to 30lb) loads, and a unique zipper that allows tons of side and panel access to make grabbing buried gear no big deal. The combination of technical fabrics and high spec features make the Eclipse perfect for everything from wilderness trekking and mountain walking to long, easy multipitch scrambles. The padded waist belt has stretchy pockets to keep sunscreen or a phone close at hand, and there are more pockets than you'll be able to count on an NYC-to-Zurich flight.The Eclipse also has plenty of features found on more heavy-duty packs, like side compression straps, lash points, a hydration bladder sleeve and an retractable ixe/axe pole carry system. It's hydration-compatible, so you can fill up your bladder with French wine as you're strolling through the Alps (or, you know, water).