Kelty's Catalyst 80 Backpack boasts fully adjustable comfort for big loads on week long adventures. Its PerfectFit suspension adjusts the sturdy back panels to rest perfectly on your lumbar and below your shoulders. This comfortable suspension system also includes lumbar support, dual hollow aluminum stays for stability, two layer padding at the waist belt and shoulder straps, air mesh at the back panel, and stabilizing straps at the top and belt. As if a massive 80 liter capacity isn't enough for your weekend, Kelty added a removable front compartment for an extra 10 liters of space, just in case you want to spend an extra day out there. Kelty also equipped the top loading Catalyst with a main packbag access zipper that opens wide for speedy packing. Hydration compatibility pairs your own reservoir with the Catalyst so you can hydrate on the trail. There are also multiple pockets for snacks, water bottles, layers, and ice axes or trekking poles.