Noticed that your bindle has started to get a little ragged? Fanny pack not carrying gear like it used to? Starting to accumulate actual backpacking gear? If you're looking for a more civilized trekking experience, the Arc'teryx Altra 75 Men's Backpack is a great bet to carry everything you need for a week-long trip, with seriously thoughtful features and a comfortable, customizable design that won't slow you down or beat you up.With a fantastic weight-to-volume ratio, the Altra is tailor-made for long, gear-intensive trips where small amounts of weight add up quickly. To keep the Altra from getting heavy, Arc'teryx built it with aluminum stays and lightweight but bulletproof nylon fabrics, along with a high-density foam C² suspension system that uses fewer layers than traditional back panels and is designed to sit slightly off of your back for excellent ventilation. The Altra also features a full U-zipper, letting you use it as a traditional top-access bag or giving you full access to the contents when you're loading up or unpacking. Four-way adjustable GridLock shoulder straps and a Rotating Load Transfer Disc hip belt system that pivots with your hips, keeping the load centered and comfortable even when you're moving through rough terrain.The Altra's also clearly been designed by people who actually use packs and understand what backpackers are looking for. A full U-zipper opens the main compartment of your pack, making loading up or finding things at the bottom a breeze. Wingman hip pockets are easily-accessible while you're wearing the Altra, so you can quickly grab water, gloves, or a jacket, and a brain pocket is designed specifically to hold a water bladder, so you can refill without having to dig deep into the contents of the main pocket. It also has all the requisite external straps and gear loops, and the regular/tall size comes with an extendable collar to pack even more volume. If it doesn't fit in the Altra, you probably shouldn't be bringing it.