Trails in the backcountry are rarely smooth and level, which is why Arc'teryx created its new Chilcotin 12 Hydration Pack, a unique pack that focuses on hugging your body and keeping you balanced and mobile on uneven terrain. While the unique waist belt holds the pack in place and keeps the load stable, the Spacermesh HD shoulder straps cushion the drag on your shoulders to prevent soreness after hours of hiking. The shoulder straps and back panel also utilize an Aeroform mono filament mesh to promote air flow throughout the contact patches. In addition to the main compartment, the Chilcotin also sports an inner security pocket, for your wallet or keys, and two Wingman pockets on the waist belt, easily accessed without removing the entire pack. Compact and accessible, this pack features a two liter, BPA free Widepac closure Source reservoir, easy to clean and antimicrobial. When not in use, the locking bite valve can be mounted on the shoulder strap to keep it in easy reach. A reservoir this size should provide enough fluids for about two hours of intense aerobic activity in hot weather. If you are one who enjoys a good nocturnal excursion, then you'll appreciate the highly visible reflective tabs, an upgrade in safety and confidence.